小数乘除法计算题和答案

1、乘法:5.6 X 2.9 =16.245.22 X 0.3 =1.5665X2.44=12.25.6 X 6.5 =36.48. 9X2.4 =21.361.384 X 5.1 =7.05840.059 X 0.2 =0.01189.46 X2.85 =26.9612.5 X 0.88 =2.27.658 X 85=650.93除法：85.44 + 16=5.3467.5+15=4.50.736+23=0.03239.6 +24=1.6551.3 +0.27=1900.66 +0.3 =2.238.4 +0.8=483.77 X 1.8 =6.7869.99 X 0.02 =0.19981.6

2、66 X 6.1 =10.16264.88 X 2.9 =14.1525.5 X 55=302.58.78 X 83=728.744.268 X 1.7=7.255617.8 X6.4=113.925.555 X5.2 =28.88636.02 X 0.3 =10.80642.84+7=6.12230.4 +6=38.443.5 +12=3.6256.21 +0.03=20791.2 +3.8=2411.97 + 1.5=7.9815+ 0.06 =2500.02 X 96=1.924.67 X 0.9 =4.2039.432 X 0.002 =0.0188645.61 X 4.3 =24.1

3、239.77 X 0.02 =0.19542.6 X61 = 158.657X5.7 =324.91.5 X4.9 =7.352.22 X3.33 =7.392656.78 X 8 =454.24101.7+9=11.321.24+36=0.5935.21 +7=5.03210+ 1.4=1500.756+0.18=4.269.6+2.9=24（循环小数的用简便方法，除不尽保留 2位小数）：8.2 +0.12 =68.33 -0.8 +0.9 =0.88 76.4 +5.4 =14.1481484.7 +3=1.5661.25 +1.2=1.0416632+42=0.7619047619041

4、4.36 + 2.7 =5.31851858.33 +6.2 = 1.341.7 +0.03 =56.66 .下载可编辑2.41 +0.7 =3.44285714285714计算0.396 + 1.2=0.330.756+0.36=2.115.6 X 13=202.80.18 X 15=2.70.025 X 14=0.353.06 X 36=110.160.04 X 0.12 =0.00483.84 X 2.6 = 10.0 (保留一位小数)5.76 X 3= 17.287.15 X 22=157.316.9 +0.13=13013.76 X0.8= 11.0086.4 X 0.5 =3.23

5、5.4 X 4.2 =148.680.25 X 0.046 =0.011590.75+3.3=27.51.55 +3.9 =0.397435897435895.2 X 0.6 =3.124.48 X 0.4 =1.7920.042 X 0.54 =0.022682.52 X 3.4 =8.5683.68 X 0.25 =0.923.7 X 0.016 =0.05928.4X1.3=10.925.25 X 5=26.250.76 X 0.32 =0.24321.08 X 25=27X 0.25 = 1.20.12 X0.5 X 0.16 =0.00964.80.125X1.4 = 0.18 （保

6、留两位小数）10.1 +3.3=3.0606（商用循环小数）3.25 X 9.04= 29.38 （用除法验算）2.5+ 0.73.571 (保留三位小数)10.75 +12.5=0.86 (用乘法验算)3、脱式计算（能简算的要简算）2.5 X7.1 X416.12X99+ 16.125.2X 0.9 +0.9=(2.5 X4) X 7.1=16.12 X (99+1)(5.2+1) X 0.9= 10X7.1= 16.12X 100=6.2X0.9=71=1612=5.587.28 7 99+7.284.3X 50X0.264-2.64 X0.5=7.28 x (99+1)=4.3 x (5

7、0X 0.2 )=64-1.32=62.68=7.28 X 100=4.3 X 10=728=43=9.下载可编辑(2.275=2.9=0.81226X15.7 + 15.7 X24=(26+24) X 15.7=50X 15.7=78.5 3.94+34.3 X0.21.2=3.94+6.86=1.2= 10.8=4.8+ 0.625) X0.28X0.28X(9.6 +2.4) +4.8X4+4.8+ 4.8=18.9 X1.1 X4.72.7 X 5.4 X 3.93.6 X 9.85 -5.46=9.79 X4.7= 14.58X3.9=35.46-5.46=46.013=56.862

8、=308.05 X3.4+7.66.58 x 4.5 x 0.92.8 X 0.5+1.58=27.37+7.6=29.61X0.9= 1.4+1.58=34.97=26.649=2.9832 + 4.9 -0.94.8-4.8 X 0.5(1.25-0.125) X8=36.9-0.9=4.8-2.4= 1.25X 8-0.125 X8=36=2.4= 10-14.8 x 100.156.5X 99+ 56.57.09X 10.8 0.8 X 7.09=4.8 X100+4.8X 0.1 =56.5x (99+1)=7.09x (10.8-0.8 ).下载可编辑=480+0.48=56.5X

9、 100=7.09X 10=480.48=5650=70.94.85 + 0.35+ 1.48.7 X 17.48.7X 7.4=4.85+0.25=8.7X10=5.1=8712.5 X0.4 X2.5 X80.87 X 3.16+4.649.5 X 101=(12.5 X 8) X (0.4 X 2.5)=2.7492+4.64=9.5X 100+9.5= 100X1=7.3892=950+9.5= 100=959.50.68 + (5.2 -3.5)X 1.2540.5+ 0.810.18=0.68 + 1.7 X 1.25=50X0.18=0.4X1.25=9=0.54.8 X (15

10、 + 2.46.81+6.81X990.25X 185X40=4.8 X 6.25=6.81x(1+99)=(0.25X40) X 185=30=6.81X 100=10X 185=681= 18504.4 X 0.8 3.4 X0.8(9.37+9.37+9.37+9. 37) X 2 .=(4.4-3.4) X 0.8=(9.37X4) X2.5= 1X0.8=9.37X (4 X 2.5)=0.8=9.37X 10=93.72.37 X 6.3+2.37 X 3.72.5 X 1.25 X 0.32=2.37 X (6.3+3.7)=2.5 X 1.25 X 0.4 乂 0.8=2.37

11、 X 10=(2.5X0.4) X(1.25 X0.8)=23.7=1X1=13.8 X10.12.5 x (3.8 x 0.04)7.69 X 101=3.8 x 10+3.8X 0.1 =2.5 x 0.04 X3.8=7.69 x 100+7.69=38.38=0.38=776.690.25 X 39+0.250.125 X 7246X 0.33+54 乂 0.33=0.25 X(39+1)=0.125 X8X9=(46+54) X0.33=0.25 X40=1 X9=100 X0.33=10=9=33(8 X5.27) X1.256.81+6.81 X990.25 X185X40=(8X 1.25) X5.27=6.81 X(1+99)=0.25X 40X 185= 10X5.27=6.81X 100=10 X185=52.7=681=18506.8 X 0.75 +0.53.75 +0.125 - 2.751.53+23.4 +7.2=5.1 +0.5=30-2.7