Question

0.74×5.4+7.4×0.36+7.4×0.1用简便方法？

Answer 1

=0.74×5.4+0.74×3.6+0.74

=0.74×（5.4+3.6+1）

=0.74×10

=7.4

解法分析：利用乘法分配律逆用，按照四则运算法则进行运算，同级运算按顺序计算，不同级运算先算高级运算，所以就可以很快得出结果。

Answer 2

0.74×5.4+7.4×0.36+7.4×0.1用简便方法
0.74×5.4+7.4×0.36+7.4×0.1
=0.74×10×0.54+7.4×0.36+7.4×0.1
=7.4×0.54+7.4×0.36+7.4×0.1
=7.4×（0.54+0.36+0.1）
=7.4×1
=7.4

Answer 3

因为0.74×5.4=7.4×0.54，所以原式等于7.4×0.54+7.4×0.36+7.4×0.1=7.4×（0.54+0.36+0.1）=7.4×1.1=8.14。

Answer 4

简便计算，
0.74×5.4+7.4×0.36+7.4×0.1
＝7.4×0.54+7.4×0.36+7.4×0.1
＝7.4×(0.54+0.36+0.1)
＝7.4×1
＝7.4。

Answer 5

用乘法积不变的性质和乘法分配律进行简算。
解:
0.74×5.4+7.4×0.36+7.4×0.1
=7.4×0.54+7.4×0.36+7.4×0.1
=7.4×（0.54+0.36+0.1）
=7.4×1
=7.4