Question

用简便方法计算0.25乘72点8-2点5×3点28

Answer 1

用简便方法计算0.25乘72点8-2点5×3点28

0.25×72.8-2.5×3.28
=0.25×72.8-0.25×32.8
=0.25×（72.8-32.8）
=0.25×40
=10

用简便方法计算二点5×0点3+1点2+0.25

2.2

• 解析：

2.5×0.3+1.2+0.25

=0.75+1.2+0.25

=(0.75+0.25)+1.2

=1+1.2

=2.2

1.5乘（8-2）加3.5用简便方法计算。

计算;
1.5x（8-2）+3.5
=1.5x6+3.5
=9+3.5
=12.5

0.25乘18点7×0点四用简便方法计算

0.25x18.7x0.4
=0.25x0.4x18.7
=0.01x18.7
=0.187

24点5乘0点125乘0点28使用简便方法计算

24.5*0.125*0.28=49*0.5*0.125*0.7*0.4=49*0.7*0.5*0.4*0.125
=49*0.7*0.25=49*0.175=(50-1)*0.175=8.75-0.175=8.575

四点5×3点8 45乘0.62用简便方法怎么计算

四点5×3点8+45乘0.62
=4.5x3.8+4.5x6.2
=4.5x(3.8+6.2)
=4.5x10
=45
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用简便方法计算2点5x8点8

2.5×8.8
=2.5*8+2.5*0.8
=20+2
=22

0.25乘32×0点125用脱式计算简便方法

解：0.25x32×0.125
=0.25x(4x8)×0.125
=(0.25x4)x(8×0.125)
=1x1
=1

2点7乘10点2用简便方法计算

2.7*10.2
=2.7*(10+0.2)
=27+0.54
=27.54

36 64乘28 72用简便方法计算

36 64乘28 72用简便方法计算
36 64乘28 72
=36+1792+72
=1900
直接计算