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小數(shù)加減法專(zhuān)項(xiàng)練習(xí)200題(有答案)(1)7.4+12.86(2)20﹣5.674(3)141.2﹣48.98(4)102+4.36(5)32.15﹣27.45(6)12.9+5.01(7)29.46﹣(9.46+3.8)(8)15.75+0.65﹣2.75+3.35(9)65.71﹣4.99(10)12.42+0.48(11)0.56+11.534(12)44﹣22.13(13)91﹣22.035(14)52.6+21.237(15)9.15﹣2.18(16)3.85﹣1.5+1.32,(17)15.4+6.87(18)3.56+27.84(19)100﹣82.13=17.87(20)123.56﹣47.9+51.7(21)2.7+3.1+2.9+3.2,(22)28.42+19.48(23)42.56+3.124(24)81﹣30.75(25)15.6十0.237(26)148.2﹣25.62﹣24.38(27)4.52﹣0.74﹣0.26(28)0.42+5.4+1.58+2.6(29)5.9+28.65﹣16.57(30)57.5﹣3.25﹣16.75,(31)6.02+3.6+1.98(32)1.29+3.7+2.71+6.3(33)3.07﹣0.38﹣1.62(34)3.25+1.79﹣0.59+1.75(35)7.5+4.9﹣6.1(36)14.8+7.9﹣4.8(37)2.608+2.84(38)6.07﹣3.869(39)1.5﹣0.306(40)76.8+26.82(41)102.07﹣37.257(42)48.64+18.6(43)54.75﹣5.25﹣14.75,(44)4.68+14.79+5.32﹣10.79,(45)48.9﹣12.7﹣0.3,(46)56.4﹣39.7+24.3,(47)3.6﹣2.8+3.4﹣7.2,(48)3.67+18.5+6.33,(49)120﹣17.83﹣2.17,(50)17.17﹣6.8﹣3.2﹣6.17(51)73.8﹣1.64﹣13.8﹣5.36(52)6.75﹣(0.9+3.75)(53)27.38﹣5.34+2.62﹣4.66(54)35.72﹣4.9﹣(5.72+5.1)(55)0.73﹣0.25﹣0.73+0.25(56)5.3+0.1+5.3﹣0.1(57)12.7﹣4.8﹣5.2.(58)23.25﹣6.75﹣3.25(59)4.58+2.39+(5.42+7.61)(60)9.05﹣3.86﹣3.14(61)20﹣9.18﹣0.82(62)6.53﹣(1.53+2.6)(63)5.52﹣1.074﹣0.926(64)4.21+1.04+0.79(65)1.36+4.85+2.64+6.15(66)83.7﹣12.83﹣0.17(67)4.32+5.43+6.68(68)17.17﹣6.8﹣3.2,(69)1+12.7+5.9+17.3(70)270﹣42.5﹣17.5(71)15.68﹣(7.78﹣4.32)﹣2.32,(72)0.9+9.9+99.9+999.9,(73)25.46﹣8.23﹣1.76,(74)9.4+0.3﹣6.4,(75)15.25+4.72+4.75+5.28,(76)34.823﹣(4.82+15.2),(77)12.7﹣4.8﹣5.2,(78)3.1+25.78+6.9,(79)73.8﹣1.64﹣13.8﹣5.36,(80)2.15+8.73+1.27+7.85(81)11.87﹣(8.2+1.87),(82)5.42﹣3.87﹣1.13,(83)4.38﹣1.56+0.62﹣0.44,(84)46.7﹣15.03﹣4.97(85)4.52+0.61+1.39+6.48(86)4.27﹣(1.96﹣1.73)(87)7.27﹣(1.98+0.27),(88)13.7+8.65﹣9.628,(89)12.8﹣(4.38+1.614)(90)15.17﹣(3.6+4.9),(91)35.6+(12.6﹣4.4),(92)16.4+3.5+83.6+166.5(93)4.65﹣2.55﹣1.45,(94)1.28+0.86+38.72,(95)25.74﹣3.57﹣6.43,(96)14.5﹣4.68﹣5.32,(97)0.485+0.64+3.36,(98)72.51﹣9.34﹣12.66,(99)14.02﹣4.5+0.98,(100)5.76+2.43+0.24+10.57,(101)9.28﹣(3.28+2.55),(102)9.5+4.85﹣6.13,(103)10.75﹣1.86﹣2.75﹣3.16,(104)1.3+0.94+0.06+7.7,(105)4.45+0.63+5.55,(106)45.5﹣(0.98+5.5),(107)0.96﹣0.28+0.04﹣0.72,(108)12.7+12.5+0.5,(109)0.6+0.94﹣0.208,(110)27.73﹣(4.73﹣1.85),(111)3.84+[26.5﹣(20﹣8.6)],(112)7.38﹣5.14+3.62﹣2.86,(113)5.86+13.08﹣9.27,(114)25.4﹣(15.4﹣6.4),(115)47.23﹣7.23﹣5.89,(116)4.45+0.63+5.55,(117)5.28﹣(2.9+1.28),(118)5.25+7.86﹣2.86+4.75,(119)0.96﹣0.28+0.04﹣0.72,(120)9.42+7.39+1.58,(121)18.4﹣1.6﹣5.4,(122)75.7+39.4﹣23.86,(123)21.21+38.38﹣9.79,(124)47.28+1.39+52.72,(125)2.45﹣1.68+1.54,(126)15﹣8.13﹣1.87,(127)5.14+3.225﹣6.302,(128)3.95+5.36﹣1.95,(129)13.67﹣(5.45+3.67),(130)4.26+5.48﹣1.26+4.52,(131)14.67+25.91+15.33+4.09,(132)10.75﹣(2.4﹣0.86),(133)9.61﹣4.38+0.35,(134)3.87+4.92+1.13,(135)46.24﹣8.66﹣1.34,(136)21.9﹣9.22﹣0.78+8.1,(137)35.47+39.88﹣12.37,(138)93.21﹣5.99﹣14.01,(139)15.37+28.94+4.63+1.06,(140)42.37﹣(12.37﹣9.78),(141)38.78﹣19.59+41.22﹣30.41,(142)1.9+19.9+199.9+0.3(143)429+31.1+2.04,(144)100﹣27.2﹣42.8,(145)9﹣(3.02+1.25),(146)1.8﹣1.57+0.2,(147)5.03﹣2.5+0.96,(148)35.72﹣(5.9+5.72),(149)25﹣4.7+5.3,(150)1.3+2.83+8.7+0.17,(151)2.47﹣2.2﹣3.8+7.53,(152)6.89+4.7+2.11+5.3,(153)7.46﹣2.37﹣1.63,(154)14﹣(3.65+0.24),(155)70.8﹣1.25﹣1.75,(156)5.81+8.3+4.19+11.7,(157)4.2+7.64+5.8+2.36,(158)14.28﹣2.63﹣7.37,(159)6.8+5.26+3.74+3.2,(160)6.21﹣3.8+2.2,(161)6.03+3.7+2.97,(162)17.43﹣6.57﹣2.43,(163)20.47﹣(1.47+6.8),(164)13.26+4.71+3.47+5.29,(165)22.74+8.68﹣13.74,(166)12.56﹣6.64﹣3.36,(167)45.5﹣(0.98+5.5),(168)13.6+7.94+6.4,(169)15.19+3.36+4.64+4.81,(170)4.7+7.69+5.3+2.31,(171)53.78﹣13.6﹣37.4+6.22,(172)60﹣(21.5﹣8.8)+7.3,(173)9.5+4.85﹣6.13,(174)75.8﹣(15.3﹣4.8),(175)51.27﹣8.66﹣1.34,(176)28.4﹣3.96﹣1.04+4.6,(177)70.8﹣7.25﹣1.75(178)5.81+8.3+4.19+11.7(179)794﹣198,(180)6756﹣193﹣207,(181)0.9+1.08+0.92+0.1,(182)13.59﹣6.91﹣0.09,(183)4.58+3.38+(5.48+6.62)(184)73.75﹣(4.3+8.75)(185)5﹣(4.19﹣2.83),(186)1.39+0.72+0.61+3.28,(187)8﹣3.7﹣6.3,(188)8.28﹣(1.28+3.7),(189)15.37﹣7.59+5.73﹣12.41,(190)11.72﹣7.85﹣(1.26+0.46),(191)15.37+28.44+12.56,(192)12.64﹣(3.96+4.64),(193)36.26﹣4.78+3.74,(194)7.34+7.57+12.66+6.43,(195)78.65﹣23.12﹣14.88,(195)4.58+2.39+(5.42+7.61),(196)8.27+5.84+1.73+2.16,(197)18.51﹣9.08﹣0.92,.(198)0.09+0.6+5.91+3.4,(199)7.85+6.76+2.15(200)18.43﹣3.76﹣7.24(201)21.65+(4.8﹣3.65)(202)9.64﹣(4.64﹣1.23)(203)2.7+17.6+3.3﹣5.6(204)9.87﹣3.5+2.13﹣8.5(205)5.64+4.97+0.03,(206)10.93﹣3.74﹣4.26,(207)10﹣6.8﹣3.2,(208)5.81+8.3+4.19+11.7,(209)3.78﹣1.46+1.54,(210)8.45﹣(5.45+2.98);,(211)3.01+8.2+6.99+1.8,(212)4.3﹣(5.98﹣5.7),(213)5.52﹣0.55﹣0.45,(214)19.6﹣26.72+80.4﹣3.28,(215)27.5﹣10.8﹣0.2,(216)43.5+18﹣13.5,(217)63.5﹣(43.5+20),(218)75.36﹣24.9+24.64﹣25.1,(219)12.56﹣6.64﹣3.36,(220)45.5﹣(0.98+5.5),(221)6+7.94+6.4,(222)5.41+3.46﹣2.46,(223)2.03﹣0.18﹣2.82+7.97,(224)10﹣4.44﹣5.56,(225)32.63+7.89﹣6.4,(226)3.97+0.7﹣1.32,(227)30﹣(3.8+0.75),(228)75.6﹣(14.3﹣8.3),參考答案:(1)7.4+12.86=20.26;(2)20﹣5.674=14.326;(3)141.2﹣48.98=92.22;(4)102+4.36=106.36;(5)32.15﹣27.45=4.7;驗(yàn)算:(6)12.9+5.01=17.91;驗(yàn)算:(7)29.46﹣(9.46+3.8),=29.46﹣9.46﹣3.8,=20﹣3.8,=16.2;(8)15.75+0.65﹣2.75+3.35,=(15.75﹣2.75)+(0.65+3.35),=13+4,=17;(9)65.71﹣4.99,=65.71﹣(5﹣0.01),=65.71﹣5+0.01,=60.71+0.01,=60.72;(10)12.42+0.48=12.9,(11)0.56+11.534=12.094,(12)44﹣22.13=21.87,(13)91﹣22.035=68.965,(14)52.6+21.237=73.837,(15)9.15﹣2.18=6.97.(16)3.85﹣1.5+1.32,=2.35+1.32,=3.67;(17)15.4+6.87=22.27驗(yàn)算:(18)3.56+27.84=31.4驗(yàn)算:(19)100﹣82.13=17.87驗(yàn)算:(20)123.56﹣47.9+51.7=127.36驗(yàn)算:(21)2.7+3.1+2.9+3.2,=2.7+(3.1+2.9)+3.2,=2.7+6+3.2,=11.9.(22)28.42+19.48=47.9驗(yàn)算:(23)42.56+3.124=45.684驗(yàn)算:(24)81﹣30.75=50.25驗(yàn)算:(25)15.6十0.237=15.837驗(yàn)算:(26)148.2﹣25.62﹣24.38=148.2﹣(25.62+24.38),=148.2﹣50,=98.2.(27)4.52﹣0.74﹣0.26=4.52﹣(0.74+0.26)=4.52﹣1=3.52;(28)0.42+5.4+1.58+2.6=(0.42+1.58)+(5.4+2.6)=2+8=10;(29)5.9+28.65﹣16.57=17.98;(30)57.5﹣3.25﹣16.75,=57.5﹣(3.25+16.75),=57.5﹣20,=37.5;(31)6.02+3.6+1.98=6.02+1.98+3.6,=8+3.6,=11.6;(32)1.29+3.7+2.71+6.3=(1.29+2.71)+(3.7+6.3),=4+10,=14;(33)3.07﹣0.38﹣1.62=3.07﹣(0.38+1.62),=3.07﹣2,=1.07;(34)3.25+1.79﹣0.59+1.75=(3.25+1.75)+(1.79﹣0.59),=5+1.2,=6.2;(35)7.5+4.9﹣6.1=12.4﹣6.1,=6.3;(36)14.8+7.9﹣4.8=14.8﹣4.8+7.9,=10+7.9=17.9(37)2.608+2.84=5.448,(38)6.07﹣3.869=2.201,(39)1.5﹣0.306=1.194,(40)76.8+26.82=103.62,(41)102.07﹣37.257=64.813,(42)48.64+18.6=67.24.(43)54.75﹣5.25﹣14.75,=54.75﹣(14.75+5.25),=54.75﹣20,=34.75;(44)4.68+14.79+5.32﹣10.79,=(4.68+5.32)+(14.79﹣10.79),=10+4,=14;(45)48.9﹣12.7﹣0.3,=48.9﹣(12.7+0.3),=48.9﹣13,=35.9;(46)56.4﹣39.7+24.3,=16.7+24.3,=41;(47)3.6﹣2.8+3.4﹣7.2,=(3.6+13.4)﹣(2.8+7.2),=17﹣10,=7;(48)3.67+18.5+6.33,=(3.67+6.33)+18.5,=10+18.5,=28.5;(49)120﹣17.83﹣2.17,=120﹣17.83﹣2.17,=120﹣(17.83+2.17),=120﹣20,=100;(50)17.17﹣6.8﹣3.2﹣6.17=(17.17﹣6.17)﹣(6.8+3.2),=11﹣10,=1;(51)73.8﹣1.64﹣13.8﹣5.36=73.8﹣13.8﹣(1.64+5.36),=60﹣7,=53;(52)6.75﹣(0.9+3.75)=6.75﹣3.75﹣0.9,=3﹣0.9,=2.1;(53)27.38﹣5.34+2.62﹣4.66=22.04+2.62﹣4.66,=24.66﹣4.66,=20;(54)35.72﹣4.9﹣(5.72+5.1)=35.72﹣(4.9+5.72+5.1),=35.72﹣15.72,=20;(55)0.73﹣0.25﹣0.73+0.25=0.75﹣0.75﹣0.25+0.25,=0﹣0.25+0.25,=0﹣0,=0;(56)5.3+0.1+5.3﹣0.1=5.3+5.3+0.1﹣0.1,=10.6+0.1﹣0.1,=10.7﹣0.1,=10.6;(57)12.7﹣4.8﹣5.2.=12.7﹣(4.8+5.2);=12.7﹣10,=2.7.(58)23.25﹣6.75﹣3.25=23.25﹣(6.75+3.25),=23.25﹣10,=13.25.(59)4.58+2.39+(5.42+7.61)=(4.58+5.42)+(2.39+7.61)=10+10,=20;(60)9.05﹣3.86﹣3.14,=9.05﹣(3.86+3.14),=9.05﹣7,=2.05;(61)20﹣9.18﹣0.82,=20﹣(9.18+0.82),=20﹣10,=10.(62)6.53﹣(1.53+2.6),=6.53﹣1.53﹣2.6,=4﹣2.6,=1.4.(63)5.52﹣1.074﹣0.926,=5.52﹣(1.074+0.926),=5.52﹣2,=3.52.(64)4.21+1.04+0.79,=4.21+0.79+1.04,=5+1.04,=6.04(65)1.36+4.85+2.64+6.15,=(1.36+2.64)+(4.85+6.15),=4+11,=15;(66)83.7﹣12.83﹣0.17,=83.7﹣(12.83+0.17),=83.7﹣13,=70.7;(67)4.32+5.43+6.68,=4.32+6.68+5.43,=11+5.43,=16.43;(68)17.17﹣6.8﹣3.2,=17.17﹣(6.8+3.2),=17.17﹣10,=7.17;(69)1+12.7+5.9+17.3=1+(12.7+17.3)+5.9,=1+30+5.9,=36.9;(70)270﹣42.5﹣17.5=270﹣(42.5+17.5),=270﹣60,=210;(71)15.68﹣(7.78﹣4.32)﹣2.32,=15.68﹣7.78+4.32﹣2.32,=(15.68+4.32)﹣(7.78+2.32),=20﹣10,=10;(72)0.9+9.9+99.9+999.9,=1﹣0.1+10﹣0.1+100﹣0.1+1000﹣0.1,=(1+10+100+1000)﹣(0.1+0.1+0.1+0.1),=1111﹣0.4,=1110.6(73)25.46﹣8.23﹣1.76,=25.46﹣(8.23+1.76),=25.46﹣9.99=15.45;(74)9.4+0.3﹣6.4,=(9.4﹣6.4)+0.3,=3+0.3,=3.3;(75)15.25+4.72+4.75+5.28,=(15.25+4.75)+(4.72+5.28),=20+10,=30;(76)34.823﹣(4.82+15.2),=34.823﹣4.82﹣15.2,=30.003﹣15.2,=14.803;(77)12.7﹣4.8﹣5.2,=12.7﹣(4.8+5.2),=12.7﹣10,=2.7;(78)3.1+25.78+6.9,=(3.1+6.9)+25.78,=10+25.78,=35.78;(79)73.8﹣1.64﹣13.8﹣5.36,=(73.8﹣13.8)﹣(1.64+5.36),=60﹣7,=53(80)2.15+8.73+1.27+7.85=(2.15+7.85)+(8.73+1.27),=10+10,=20;(81)11.87﹣(8.2+1.87),=11.87﹣1.87﹣8.2,=10﹣8.2,=1.8;(82)5.42﹣3.87﹣1.13,=5.42﹣5,=0.42;(83)4.38﹣1.56+0.62﹣0.44,=(4.38+0.62)﹣(1.56+0.44),=5﹣2,=3;(84)46.7﹣15.03﹣4.97=46.7﹣(15.03+4.97),=46.7﹣20,=26.7;(85)4.52+0.61+1.39+6.48=(4.52+6.48)+(0.61+1.39),=11+2,=13;(86)4.27﹣(1.96﹣1.73)=4.27﹣0.23,=4.04;(87)7.27﹣(1.98+0.27),=7.27﹣0.27﹣1.98,=7﹣1.98,=5.02;(88)13.7+8.65﹣9.628,=22.35﹣9.628,=12.722;(89)12.8﹣(4.38+1.614)=12.8﹣5.994=6.806(90)15.17﹣(3.6+4.9),=15.17﹣8.5,=6.67;(91)35.6+(12.6﹣4.4),=35.6+8.2,=43.8;(92)16.4+3.5+83.6+166.5=(16.4+83.6)+(3.5+166.5)=100+170=270;(93)4.65﹣2.55﹣1.45,=4.65﹣(2.55+1.45),=4.65﹣4,=0.65;(94)1.28+0.86+38.72,=(1.28+38.72)+0.86,=40+0.86,=40.86;(95)25.74﹣3.57﹣6.43,=25.74﹣(3.57+6.43),=25.74﹣10,=15.74;(96)14.5﹣4.68﹣5.32,=14.5﹣(4.68+5.32),=14.5﹣10,=4.5;(97)0.485+0.64+3.36,=0.485+(0.64+3.36),=0.485+4,=4.485;(98)72.51﹣9.34﹣12.66,=72.51﹣(9.34+12.66),=72.51﹣22,=50.51;(99)14.02﹣4.5+0.98,=(14.02+0.98)﹣4.5,=15﹣4.5,=10.5;(100)5.76+2.43+0.24+10.57,=(5.76+0.24)+(2.43+10.57),=6+13,=19;(101)9.28﹣(3.28+2.55),=9.28﹣3.28﹣2.55,=6﹣2.55,=3.45;(102)9.5+4.85﹣6.13,=14.35﹣6.13,=8.22;(103)10.75﹣1.86﹣2.75﹣3.16,=(10.75﹣2.75)﹣(1.86+3.16),=8﹣5.02,=2.98(104)1.3+0.94+0.06+7.7,=(1.3+7.7)+(0.94+0.06),=9+1,=10;(105)4.45+0.63+5.55,=(4.45+5.55)+0.63,=10+0.63,=10.63;(106)45.5﹣(0.98+5.5),=45.5﹣0.98﹣5.5,=(45.5﹣5.5)﹣0.98,=40﹣0.98,=40﹣(1﹣0.02),=40﹣1+0.2,=39.02;(107)0.96﹣0.28+0.04﹣0.72,=(0.96+0.04)﹣(0.28+0.72),=1﹣1,=0.(108)12.7+12.5+0.5,=12.7+(12.5+0.5),=12.7+13,=25.7(109)0.6+0.94﹣0.208,=1.54﹣0.208,=1.332;(110)27.73﹣(4.73﹣1.85),=27.73﹣4.73+1.85,=23+1.85,=24.85;(111)3.84+[26.5﹣(20﹣8.6)],=3.84+[26.5﹣11.4],=3.84+15.1,=18.94(112)7.38﹣5.14+3.62﹣2.86,=(7.38+3.62)﹣(5.14+2.86),=11﹣8,=3;(113)5.86+13.08﹣9.27,=18.94﹣9.27,=9.67;(114)25.4﹣(15.4﹣6.4),=25.4﹣15.4+6.4,=10+6.4,=16.4;(115)47.23﹣7.23﹣5.89,=40﹣5.89,=34.11.(116)4.45+0.63+5.55,=4.45+5.55+0.63,=10+0.63,=10.63;(117)5.28﹣(2.9+1.28),=5.28﹣1.28﹣2.9,=4﹣2.9,=1.1;(118)5.25+7.86﹣2.86+4.75,=(5.25+4.75)+(7.86﹣2.86),=10+5,=15;(119)0.96﹣0.28+0.04﹣0.72,=(0.96+0.04)﹣(0.28+0.72),=1﹣1,=0.(120)9.42+7.39+1.58,=(9.42+1.58)+7.39,=11+7.39,=18.39;(121)18.4﹣1.6﹣5.4,=18.4﹣(1.6+5.4),=18.4﹣7,=11.4(122)75.7+39.4﹣23.86,=115.1﹣23.86,=91.24;(123)21.21+38.38﹣9.79,=59.59﹣9.79,=49.8;(124)47.28+1.39+52.72,=47.28+52.72+1.39,=100+1.39,=101.39;(125)2.45﹣1.68+1.54,=0.77+1.54,=2.31(126)15﹣8.13﹣1.87,=15﹣(8.13+1.87),=15﹣10,=5;(127)5.14+3.225﹣6.302,=8.365﹣6.302,=2.063;(128)3.95+5.36﹣1.95,=3.95﹣1.95+5.36,=2+5.36,=7.36;(129)13.67﹣(5.45+3.67),=13.67﹣5.45﹣3.67,=13.67﹣3.67﹣5.45,=10﹣5.45,=4.55;(130)4.26+5.48﹣1.26+4.52,=(4.52+5.48)+(4.26﹣1.26),=10+3;=13;(131)14.67+25.91+15.33+4.09,=(14.67+15.33)+(25.91+4.09),=30+30,=60(132)10.75﹣(2.4﹣0.86),=10.75﹣1.54,=9.21;(133)9.61﹣4.38+0.35,=5.23+0.35,=5.58;(134)3.87+4.92+1.13,=(3.87+1.13)+4.92,=5+4.92,=9.92;(135)46.24﹣8.66﹣1.34,=46.24﹣(8.66+1.34),=46.24﹣10,=36.24;(136)21.9﹣9.22﹣0.78+8.1,=21.9﹣(9.22+0.78)+8.1,=21.9﹣10+8.1,=11.9+8.1,=20;(137)35.47+39.88﹣12.37,=(35.47﹣12.37)+39.88,=23.1+39.88,=62.98;(138)93.21﹣5.99﹣14.01,=93.21﹣(5.99+14.01),=93.21﹣20,=73.21;(139)15.37+28.94+4.63+1.06,=(15.37+4.63)+(28.94+1.06),=20+30,=50;(140)42.37﹣(12.37﹣9.78),=42.37﹣12.37+9.78,=30+9.78,=39.78(141)38.78﹣19.59+41.22﹣30.41,=38.78+41.22﹣19.59﹣30.41,=(38.78+41.22)﹣(19.59+30.41),=80﹣50,=30;(142)1.9+19.9+199.9+0.3=1.9+19.9+199.9+0.1+0.1+0.1,=(1.9+0.1)+(19.9+0.1)+(199.9+0.1),=2+20+200,=222;(143)429+31.1+2.04,=429+(31.1+2.04),=429+33.14,=462.14,(144)100﹣27.2﹣42.8,=100﹣(27.2+42.8),=100﹣70,=30,(145)9﹣(3.02+1.25),=9﹣4.27,=4.73,(146)1.8﹣1.57+0.2,=1.8+0.2﹣1.57,=2﹣1.57,=0.43(147)5.03﹣2.5+0.96,=2.53+0.96,=3.49;(148)35.72﹣(5.9+5.72),=35.72﹣5.9﹣5.72,=35.72﹣5.72﹣5.9,=30﹣5.9,=24.1;(149)25﹣4.7+5.3,=20.3+5.3,=25.6;(150)1.3+2.83+8.7+0.17,=(1.3+8.7)+(2.83+0.17),=10+3,=13;(151)2.47﹣2.2﹣3.8+7.53,=(2.47+7.53)﹣(2.2+2.8),=10﹣5,=5(152)6.89+4.7+2.11+5.3,=(6.89+2.11)+(4.7+5.3),=9+10,=19;(153)7.46﹣2.37﹣1.63,=7.46﹣(2.37+1.63),=7.46﹣4,=3.46;(154)14﹣(3.65+0.24),=14﹣3.89,=10.11;(155)70.8﹣1.25﹣1.75,=70.8﹣(1.25+1.75),=70.8﹣3,=67.8;(156)5.81+8.3+4.19+11.7,=(5.81+4.19)+(8.3+11.7),=10+20,=30;(157)4.2+7.64+5.8+2.36,=(4.2+5.8)+(7.64+2.36),=10+10,=20;(158)14.28﹣2.63﹣7.37,=14.28﹣(2.63+7.37),=14.28﹣10,=4.28;(159)6.8+5.26+3.74+3.2,=(6.8+3.2)+(5.26+3.74),=10+9,=19;(160)6.21﹣3.8+2.2,=2.41+2.2,=4.61;(161)6.03+3.7+2.97,=(6.03+2.97)+3.7,=9+3.7,=12.7;(162)17.43﹣6.57﹣2.43,=17.43﹣(6.57+2.43),=17.43﹣9,=8.43;(163)20.47﹣(1.47+6.8),=20.47﹣1.47﹣6.8,=19﹣6.8,=12.2;(164)13.26+4.71+3.47+5.29,=(13.26+3.47)+(4.71+5.29),=16.73+10,=26.73;(165)22.74+8.68﹣13.74,=(22.74﹣13.74)+8.68,=9+8.68,=17.68(166)12.56﹣6.64﹣3.36,=12.56﹣(6.64+3.36),=12.56﹣10,=2.56;(167)45.5﹣(0.98+5.5),=45.5﹣0.98﹣5.5,=45.5﹣5.5﹣0.98,=40﹣0.98,=39.02;(168)13.6+7.94+6.4,=(13.6+6.4)+7.94,=20+7.94,=27.94;(169)15.19+3.36+4.64+4.81,=(15.19+4.81)+(3.36+4.64),=20+8,=28(170)4.7+7.69+5.3+2.31,=(4.7+5.3)+(7.69+2.31),=10+10,=20.(171)53.78﹣13.6﹣37.4+6.22,=(53.78+6.22)﹣(13.6+37.4),=60﹣51,=9.(172)60﹣(21.5﹣8.8)+7.3,=60﹣12.7+7.3,=47.3+7.3,=54.6(173)9.5+4.85﹣6.13,=14.35﹣6.13,=8.22;(174)75.8﹣(15.3﹣4.8),=75.8﹣10.5,=65.3;(175)51.27﹣8.66﹣1.34,=51.27﹣(8.66+1.34),=51.27﹣10,=41.27;(176)28.4﹣3.96﹣1.04+4.6,=(28.4+4.6)﹣(3.96+1.04),=33﹣5,=28;(177)70.8﹣7.25﹣1.75=70.8﹣(7.25+1.75),=70.8﹣9,=61.8;(178)5.81+8.3+4.19+11.7=(5.81+4.19)+(8.3+1.7),=10+10,=20;(179)794﹣198,=794﹣(200﹣2),=794﹣200+2,=594+2,=596;(180)6756﹣193﹣207,=6756﹣(193+207),=6756﹣400,=6356;(181)0.9+1.08+0.92+0.1,=(0.9+0.1)+(1.08+0.92),=1+2,=3;(182)13.59﹣6.91﹣0.09,=13.59﹣(6.91+0.09),=13.59﹣7,=6.59(183)4.58+3.38+(5.48+6.62)=4.58+5.48+(3.38+6.62),=10.06+10,=20.06;(184)73.75﹣(4.3+8.75)=73.75﹣8.75﹣4.3,=65﹣4.3,=60.7;(185)5﹣(4.19﹣2.83),=5﹣1.36,=3.64;(186)1.39+0.72+0.61+3.28,=(1.39+0.61)+(0.72+3.28),=2+4,=6;(187)8﹣3.7﹣6.3,=8﹣(3.7+6.3),=8﹣10,=﹣2;(188)8.28﹣(1.28+3.7),=8.28﹣1.28﹣3.7,=7﹣3.7,=3.3(189)15.37﹣7.59+5.73﹣12.41,=(15.37+5.73)﹣(7.59+12.41),=21﹣20,=1;(190)11.72﹣7.85﹣(1.26+0.46),=11.72﹣7.85﹣1.72,=11.72﹣1.72﹣7.85,=10﹣7.85,=2.15(191)15.37+28.44+12.56,=15.37+(28.44+12.56),=15.37+41,=56.37;(192)12.64﹣(3.96+4.64),=12.64﹣3.96﹣4.64,=12.64﹣4.64﹣3.96,=8﹣3.96,=4.04;(193)36.26﹣4.78+3.74,=36.26+3.74﹣4.78,=40﹣4.78,=35.22;(194)7.34+7.57+12.66+6.43,=(7.34+12.66)+(7.57+6.43),=20+14,=34;(195)78.65﹣23.12﹣14.88,=78.65﹣(23.12+14.88),=78.65﹣38,=40.65(195)4.58+2.39+(5.42+7.61),=(4.58+5.42)+(2.39+7.61),=10+10,=20.(196)8.27+5.84+1.73+2.16,=(8.27+1.73)+(5.84+2.16),=10+8,=18.(197)18.51﹣9.08﹣0.92,=18.51﹣(9.08+0.9

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