如题所述
第1个回答 2021-01-05
简便计算，利用乘法的结合律，
61*(60+1)-60
=61*60+61*1-60
=3660+1
=3661
61*(60+1)-60
=61*60+61*1-60
=3660+1
=3661
第2个回答 2021-01-04
简便计算为
61*61－60
=61*(60+1)－61
=61*60+61－60
=3660+1
=3661
答案就是3661
61*61－60
=61*(60+1)－61
=61*60+61－60
=3660+1
=3661
答案就是3661
第3个回答 2021-01-04
61*61-60
=61*（60+1）-60
=61*60+61-60
=60（61-1）+61
=60*60+61
=3600+61
=3661
希望可以帮到你。
=61*（60+1）-60
=61*60+61-60
=60（61-1）+61
=60*60+61
=3600+61
=3661
希望可以帮到你。
第4个回答 2021-01-04
(60+1)×(60+1)-60
=3600+60+60+1-60
=3660+1
=3661
=3600+60+60+1-60
=3660+1
=3661
