98x13十102x12怎样简运算

2025-04-06 04:31:47
推荐回答(1个)
回答1:

98x13十102x12
解:简便计算
=(100-2)x13+(100+2)x12
=100x13-2x13+100x12+2x12
=100x(13+12)-2x(13-12)
=100x25-2
=2500-2
=2498
祝学习进步。