Question

77乘77加22乘77加77的简便运算？

Answer 1

乘法分配律为：两个数的和与一个数相乘，先将它们与这个数分别相乘，再相加，积不变．即：（a+b）×c=a×c+b×c．反过来则：a×c+b×c=（a+b）×c
77×77+22×77+77
= 77× ( 77+22+1）
=77 ×100
=7700

Answer 2

因为他们都有77
利用分配律
77*（77+22+1）
=77×100
＝7700

Answer 3

77x77+22x77+77
77x77+(22+1)x77
77x77+23x77
(77x1+23x1)x77
(77+23)x77
100x77=7700

Answer 4

77×77+77×22+77
=77×（77+22+1）
=77×100
=7700

Answer 5

77×77+22×77+77
=77×(77+22+1)
=77×100
=7700