Question

0.655×112-1.2×6.55的简便运算是什么？

Answer 1

解：原式=6.55X1/10X112一1.2X6.55=6.55X（1/10X112）一1.2X6.55=6.55X11.2一1.2X6.55=6.55（11.2一1.2）=6.55X（10+1.2一1.2）=6.55X10=65.5。

Answer 2

0.655×112-1.2×6.55
=6.55×11.2-6.55X1.2
=6.55X（11.2-1.2）
=6.55×10
=65.5

Answer 3

先把算式0.655×112-1.2×6.55写成6.55×11.2-1.2×6.55
然后算式=6.55×（11.2-1.2）
最后算式=6.55×10=65.5

Answer 4

0.655X112-1.2x6.55
=6.55X11.2-6.55X1.2
=6.55X(11.2-1.2)
=6.55X10
=65.5

Answer 5

这道题可以利用积不变的规律转化出公因数，然后利用乘法分配律来进行简便计算。
0.655×112-1.2×6.55
=6.55×11.2-1.2×6.55
=6.55×(11.2-1.2)
=6.55×10
=65.5