71×15+15×22+15×12用简便方法计算

2025-04-13 06:57:46
推荐回答(4个)
回答1:

71×15+15×22+15×12
=(71+22+12)×15
=(100+5)×15
=100×15+5×15
=1500+75
=1575

回答2:

=15*(71+22+12)
=15*105
=1575

回答3:

=15x(71+22+12)
=15x(100+5)
=1500+75
=1575

回答4:

=(71+22+12)×15
=105×15
=100×15+5×15
=1500+75
=1575