又简便方法计算49+49乘以25

又简便方法计算49+49乘以25
2025-04-14 22:27:45
推荐回答(1个)
回答1:

49+49×25
=(1+25)×49
=26×49
=26×(50-1)
=26×50-26
=1300-26
=1274