简便运算:77×98

问题描述:

简便运算:77×98

77×98
=77×(100-2)
=77×100-77×2
=7700-154
=7546简便运算:77×103=77×(100+3)
=77000+231
=77231简便运算:77×98+154=77×98+154
=77×(100-2)+154
=77×100-77×2
=7700-154+154
=7546+154
=7700最佳答案:77×98+154=77×98+2×77=77×(98+2)=77×100=7700你的答案太复杂了、太多了哦,谢谢