Question

0.37×5.5-3.7×0.45的简便算法？

Answer 1

0.37×5.5－3.7×0.45
＝0.37×5.5－0.37×10×0.45
＝0.37×5.5－0.37×4.5
＝0.37×（5.5－4.5）
＝0.37×1
＝0.37

Answer 2

0.37×5.5-3.7×0.45=3.7×0.55-3.7×0.45=3.7×（0.55-0.45）=3.7×0.1=0.37

Answer 3

0.37×5.5-3.7×0.45
=3.7x0.55-3.7x0.45
=3.7x（0.55-0.45）
=3.7x0.1
=0.37
乘法分配律是一种简算定律：两个数的和与一个数相乘，可以先把它们分别与这个数相乘，再相加，得数不变，这叫做分配律。
字母表示：(a+b)×c=a×c+b×c
变式：(a-b)×c=a×c-b×c

Answer 4

0.37×5.5-3.7×0.45
＝0.37×10×0.55-3.7×0.45
＝3.7×0.55-3.7×0.45
＝3.7×(0.55-0.45)
＝3.7×0.1
＝0.37

Answer 5

解：原式=0.37（5.5—0.45）=0.37x5.05=0.37×（5+0.05）=0.37x5+0.37x0.05=1.85+0.0185=1.865。