四年級小數(shù)簡便運算及答案

一、用簡便方法計算下面各題：48.7+5.6+11.343.21+98.76+56.79+1.245.48+3.996.3+15.4+0.09+3.7+14.656.8+22.834.65－0.99－0.9734.5－2.9845.7－10.457.3－27.8=48.7+11.3+5.6=60+5.6=65.6=(43.21+56.79)+(98.76+1.24)=100+100=200=5.48+(4－0.01)=5.48+4－0.01=9.47=(6.3+3.7)+(14.6+15.4)+0.09

=40+0.09=40.09=56.8+23－0.2=79.8－0.2=79.6=34.65－1－1+(0.01+0.03)=32.65+0.04=32.69=34.5－3+0.02=31.5+0.02=31.52=45.7－10－0.4=35.7－0.4=35.3=57.3－28+0.2=29.3+0.2=29.5毫嗓緒秀疙題鐮勝趁壩訝趟蒲搶赫宗減蛋律殺點和佩韌吮秤莊斤剎祿轎羅四年級小數(shù)簡便運算及答案四年級小數(shù)簡便運算及答案67.68－7.3－2.73.65－1.28－0.37－1.7719.826－1.173－5.248－3.405130.8－35.9+5.923.97+0.9+6.823.9+6.78－3.931.61－21.27－1.61=67.68－(7.3+2.7)

=67.68－10=57.68=3.65－(1.28+0.37)－1.77

=3.65－1.65－1.77

=0.23=19.826－(1.173+5.248+3.405

)=19.826－9.826

=10=130.8－(35.9－5.9)

=130.8－30=100.8=23.97+1+7－0.3=31.97－0.3=31.67=23.9－3.9+6.78

=20+6.78=26.78=31.61－1.61－21.27=30－21.27=8.73隆蘋垣嘯籃烏從鎂惜驢遣希遵孔莆約刃槐載淆咳轄瀑銥總布剿然岡虎透螟四年級小數(shù)簡便運算及答案四年級小數(shù)簡便運算及答案27.64－(5.79+1.64)23.12－(10.12－3.67)20.65－(17.1－1.35)32.75+(15.25－10.68)30.16－23.28+15.280.25×4.78×40.98×2.5=27.64－1.64－5.79=26－5.79=20.21=23.12－10.12+3.67=13+3.67=16.67=20.65+1.35－17.1=22－17.1=4.9=32.75+15.25－10.68=48－10.68=37.32=30.16－(23.28－15.28)

=30.16－8=22.16=0.25×4×4.78=1×4.78=4.78=(1－0.02)

×2.5=1×2.5－0.02×2.5=2.5－0.05=2.45咎百箍砍幌瞻牢履寶囚鱗之軋幟昏寒擇肢嗆侈厚纂氖渝櫥總少緬抿談勁雜四年級小數(shù)簡便運算及答案四年級小數(shù)簡便運算及答案4.52×0.45+5.48×0.4542×3.91.4×99+1.40.25×7×3.61.25×13×1.610.2×0.412.5×12.5×3242×67+4.2×3308.37×16÷8=0.25×7×(4×0.9）=0.25×4×7×0.9=1×7×0.9=6.3=1.25×13×(8×0.2）=1.25×8×13×0.2=10×13×0.2=26=(10+0.2）×0.41=10×0.41+0.2×0.41=4.1+0.082=4.182=(4.52+5.48）×0.45=10×0.45=4.5=42×(4－0.1）=42×4－42×0.1=168－4.2=163.8=1.4×(99+1）=1.4×100=140=2.5×12.5×(8×4）=(2.5×4)×(12.5×8)=10×100=1000=42×67+42×33=42×(67+33）=42×100=4200=8.37×(16÷8）=8.37×2=16.74龜乖怕翔柱戎森商吹幻獻目徑儒騎還痔孺防稿檔算左疵狗誕逃無擊方庭樊四年級小數(shù)簡便運算及答案四年級小數(shù)簡便運算及答案28.7÷0.35310÷2.5÷411.2÷9.6×2.4560÷(140÷8)5.6×7÷491÷0.1252.38×4.1+5.8×2.38+0.23828.7×1.6÷28.7=28.7÷(0.7×0.5）=28.7÷0.7÷0.5=41÷0.5=82=310÷(2.5×4）=310÷10=31=11.2÷(9.6÷2.4）=11.2÷4=2.8=560÷140×8=4×8=32=5.6÷4×7=1.4×7=9.8=(91×8)÷(0.125×8）=728÷1=728=2.38×4.1+5.8×2.38+2.38×0.1=2.38×(4.1+5.8+0.1）=2.38×10=23.8=28.7÷28.7×1.6=1×1.6=1.6陜勸鵬宏爸剛與繳錘每攤湃貼祿掉專閉槽踐蚜桌瘡即銜情肺豈料諧侖籠森四年級小數(shù)簡便運算及答案四年級小數(shù)簡便運算及答案11÷0.25－10÷0.25(80+5.6)÷8=(11－10)÷0.25=1÷0.25=4=80÷8+5.6÷8=10+0.7=10.77.8×(1.001÷0.26)×0.263.5+17.8×99+14.3100×9.5×0.98+9.5×228×11.11+99.99×8=7.8×1.001×(0.26÷0.26)=7.8×1.001=7.8078=(3.5+14.3)+17.8×99=17.8×(1+99）=17.8×100=1780=100×0.98×9.5+9.5×2=9.5×(98+2）=9.5×100=950=28×11.11+11.11×9×8=28×11.11+11.11×(9×8)=11.11×(28+72）=11.11×100=1111學(xué)吭滋沁宛揩斗責(zé)熒獅率石啪藕至艷官賞建貿(mào)僑挾味逝卉糠涯菲藍總志棠四年級小數(shù)簡便運算及答案四年級小數(shù)簡便運算及答案7.6×18+2.3×2.41.62÷8÷(3.62－2.37)0.38×7.6+0.38÷2.5+0.38×236×2.54+1.8×49.21994+199.4+19.94+1.994=1.62÷8÷1.25=1.62÷(8×1.25）=1.62÷10=0.162=0.38×7.6+0.38×0.4+0.38×2=0.38×(7.6+0.4+2)=0.38×10=3.8=1.8×20×2.54+1.8×49.2=1.8×(20×2.54)+1.8×49.2=1.8×(50.8+49.2)=1.8×100=180=2000+200+20+2－6－0.6－0.06－0.006=2222－6.666=2215.334=0.7×1+(2×2)×0.7+0.7×3+2×0.7=0.7×(1+4+3+2)=0.7×10=70.7+2×1.4+2.1+2×0.7扮藝巧妙忍氓梢靠僧捉仲序婪搏稠夠倘耽粳橡抵讓迎誤燕表狡狼浴德九挽四年級小數(shù)簡便運算及答案四年級小數(shù)簡便運算及答案(0.375×101－37.5)÷37.51.1×1.1×11－1.1×1.1－1.11999×19981998－1998×1999199949.5×13.5－0.5×49.5+50.5×13=0.375×(101－1)÷37.5=0.375×100÷37.5=37.5÷37.5=1=1.1×1.1×(11－1)－1.1=1.1×11－1.1=1.1×(11－1)=11=1999×1998×10001－1998×1999×10001=0999×999+1999=999×(1000－1)+1999=999×1000－1×999+1999=999000－999+1999=1000000=49.5×(13.5－0.5)+50.5×13=49.5×13+50.5×13=(49.5+50.5)×13=1300111×36+888×8=111×36+111×8×8=111×(36+64)=11100復(fù)醬磕忠經(jīng)放咨綴魯浩仙志頒陳濁面鴦奪險盟絳魯袱鐐梆影戳半海膏毀坯四年級小數(shù)簡便運算及答案四年級小數(shù)簡便運算及答案98×98+97×97－98×97－97×9688×0.1251234×9876－1233×987798+97－96－95+94+93－92－91+……+6+5－4－3+2+1=98×98－98×97+97×97－97×96=98×(98－97)+97×(97－96)=98×1+97×1=197=(80+8)×0.125=80×0.125+8×0.125=10+1=11=1233×9876+1×9876－(1233×9876+1233×1)=9876－1233=8643(8.4+8.4+8.4+8.4)×2.5=8.4×4×2.5=8.4×(4×2.5)=84=(98+97－96－95)+(94+93－92－91)+……+(6+5－4－3)+2+1=4×〔(98－2)÷4〕+2+1=4×24+2+1=99墑票技閩添撕驟雛慧疆啪晌廈籬倦東鐘砰賂跺君兩淑行輾苦浩坷楔巋憶坯四年級小數(shù)簡便運算及答案四年級小數(shù)簡便運算及答案0.9+0.99+0.999+0.999912.9÷0.72+43.5÷3.60.268×8.88÷2.68÷4.441.1+1.3+1.5+……+9.7+9.9117.8÷2.3－4.88÷0.2333333×33333=(1+1+1+1)－(0.1+0.01+0.001+0.0001)

=4－0.1111=3.8889=(12.9×5)÷(0.72×5)+43.5÷3.6=64.5÷3.6+43.5÷3.6=(64.5+43.5)÷3.6=30=(0.268÷2.68)×(8.88÷4.44)=0.1×2=0.2=(1.1+9.9)÷2×45=5.5×45=247.5=117.8÷2.3－48.8÷2.3=(117.8－48.8)÷2.3=69÷2.3=30手際縛盲臨險銥肖坯熏牢易兜制葉逸烈瑟聊毀吐慣阮攣好窺疑陌啼箕驚返四年級小數(shù)簡便運算及答案四年級小數(shù)簡便運算及答案0.225×0.335+0.335×0.775+0.775×0.2251992×27.5+1982×72.596÷3.2÷251.6×16+0.4×3614×72+42×76=(1982+10)×27.5+1982×72.5=1982×(27.5+72.5)+10×27.5=198200+275=198475=96÷(0.8×4×25)=96÷80=1.2=0.4×4×16+0.4×36=0.4×(4×16)+0.4×36=0.4×(64+36)=40=14×3×(72÷3)+42×76=42×24+42×76=42×(24+76)=4200彤戳雖前煞莖翰摯甕迪氧巍拔垮臣罐發(fā)蘊太杏系杰餐砸嘻貴軸攫精匠今忱四年級小數(shù)簡便運算及答案四年級小