Question

103x25怎么简便运算？

Answer 1

简便计算
103x25
=100x25+3x25
=2500+75
=2575

Answer 2

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
103×25
=( 100+3）×25
= 100×25+3×25
= 2500+ 75
= 2575