342-297家158如何简便运算

342-297家158如何简便运算
2025-04-13 11:55:26
推荐回答(4个)
回答1:

解:
342-297+158
=(342+158)-300+3
=500-300+3
=203

回答2:

342-297+158
=342-300+3+158
=42+1+160
=43+160
=203

回答3:

342-297+158=(340+2)-(300-3)+158=340+160-(300-3)=500-300+3=200+3=203

回答4:

解:342-297+158
=(342+158)-297

=500-297
=500-300+3
=203