四年級下冊小數(shù)簡便計算

1、精品文檔-、列豎式計算。4.8-2.81.3+2,53.1+2.2226.2-13.112.3+11.235.82-13.33.7+2.3615.4+2.9711.65-7.3910-8.755.94+10.79.82-6.184.80.250.320.89.80.54.81.20.32 X1.29.8 X1.030.12 >502.6 >0.51.3 >2.29.6 >0.85.04 >283.82 >.450.96 >6.93.8 M48 >0.150.125 >81歡血下載精品文檔7歡迎下載1.8 0.85+3.63.25-1.147

2、.620.86 >1,212>0,163.50.3 >4 9,6-1.648X6,7 >2,43.05 1.44.8-2.8M.22.75762.4+1.3+2.53.1+2.22326.2-13.112.3+11.235.82-13.3.7+2.3615.4+2.9711.65-7.3910-8.755.94+10.79.82-6.184.8 0.250.32 0.89.8 0.5 4.81.20.32 X1.29.8 X1,030,12 >502,6 >0,51,3>2,29,6 >0,85,04 >283,82 >0,450,9

3、6 >6,93,8 >448>0,150,125 >81,8 >0,850,86 M,212>0,163,5 >1,22,7+3,63,25-1,140,3 49.6-1,648X1,5762.4+7,626,7 >2,43,05M,4二、脫式計算，用你喜歡的方法計算(能簡便的要簡便),4.6-1,75+2,087,41-(2,96+3,04)3,2+1,27-2, 495-(4.19-2.83)4.28+0.53-3.371.54+2.08+3.622.8 X 5+7.2 X 52.5 X 13+0.9 2.6+1.4 X30.25 3.7 0

4、.40.89 4.8+0.895.21.83+3.79+0.1710-0.34-0.662.5 0.6-1.8 0(8+0.8)1.25.5(15.4-7.8)3.54.15+3.24+9.8 5+6.763.2 4.6+3.2 5.412.8+2.04 9.54.5 3.6+5.20.356.15 >9.4-424.5 >0.9+5.5 >0.9(7.5+2.5)0.252.25+1.25 >0.185.41.3+4.7 X0.97.5-7.5 >0.8三、解下列方程。x-19=27.8+4.56+2.25.01-1.9+4.99101M.8-4.8x-12.3

5、=3.86x=156x-47=47 59+x=1203x+6=154x-2=260.65 6.4-0.650.4 99+0.43x=630x + 52= 7 x + 28=08+x=203x+4=34精品文檔2x+5=552x+20=503x+20=50X+23.5=454x+9=24936+2x=48 m + 0.6=0.454x=36 2.5+x=10x-18=40 3x-3.9=5.12y+7=918m2=24 X+12=25 x-19=284.5+x=19.2x-15.6=27.4 x T7=68四、用方程表示下面的數(shù)量關(guān)系，并解答1、比x多7.3的數(shù)是12.8 。2、24除x的商是0.2。3、比x的6倍少9的數(shù)是274比 x 多 61.7 的數(shù)是 1285比