Question

3.82乘九点九加零点382怎么做

Answer 1

3.82乘九点九加零点382怎么做

3.82*9.9+0.382=37.818+0.382=38.2。

0.27乘九点九加零点0.027

0.27乘九点九加零点0.027
=0.027*99+0.027
=0.027*（99+1）
=0.027*100
=2.7

1.87乘九点九加零点187

1.87×9.9+0.187
=0.187×99+0.187
=0.187×(99+1)
=0.187×100
=18.7

零点九加九点九加九十九点九加九百九十九点九加零点四的简便方法怎么箅

0.9+9.9+99.9+999.9+0.4
=1-0.1+ 10 - 0.1 + 100-0.1 + 1000-0.1 +0.4
=1111

7.74乘九点九加零点774的简便用算

7．74×（10－0．1）＋0．774
＝7．74×10－7.74×0.1＋0.774
＝77．4－0.774＋0.774
＝77.4

十九点四乘零点九加零点一乘十六点四怎么用简便方法做

19.4×0.9+0.1×16.4
=（3+16.4）×0.9+0.1×16.4
=3×0.9+16.4×0.9+0.1×16.4
=2.7+16.4×（0.9+0.1）
=2.7+16.4
=19.1

怎样简便怎样算101乘九点九加101乘零点一

101×9.9+101×0.1
=101×(9.9+0.1)
=101×10
=1010

五点七乘九点九加零点五七怎样简算

=5.7*9.9+0.57
=5.7*9.9+5.7*0.1
=5.7*(9.9+0.1)
=5.7*10
=57

零点五乘九点八乘二等于零点五乘二乘九点八用了什么律

0.5x9.8x2=0.5x2x9.8
用了乘法交换律
乘法交换律用字母表示:a b=b a
这里9.8x2变成了2x9.8
0.5x2比较简便
所以运用了乘法交换律

3.84乘九点六加零点九六乘61点六的简便算法怎么写

3.84×9.6+0.96×61.6
=3.84×9.6+9.6×6.16
=（3.84+6.16）×9.6
=10×9.6
=96