Question

62×72+39×72-72的简便运算怎么写？

脱式计算能简便运算的要简便

Answer 1

62×72+39×72-72的简便运算
=72×（62+39-1）
=72x100
=7200

Answer 2

用乘法分配率解决
原式＝72×（62+39-1）
＝72×100
＝7200

Answer 3

62x72+39x72-72
=(62+39-1)x72
=100x72
=7200

Answer 4

62×72+39×72-72
=62×72+(39-1)×72
=62×72+38×72
=(62+38)×72
=7200

Answer 5

62×72+39×72-72
=62×7+39×72-1×72
=（62+39-1）×72
=100×72
=7200