如题所述
第1个回答 2021-03-18
13 x61-1x61简便算法
=（10+2）x61
=10x61+2x61
=610+122
=732
或者
13x61-1x61
=12x(60+1)
=12x60+12
=720+12
=732
=（10+2）x61
=10x61+2x61
=610+122
=732
或者
13x61-1x61
=12x(60+1)
=12x60+12
=720+12
=732
第2个回答 2021-03-18
原式=61×（13-1）
=61×12
=61×10+61×2
=610+122
=732
=61×12
=61×10+61×2
=610+122
=732
第3个回答 2021-03-18
13Ⅹ61-1ⅹ61
=(13-1)ⅹ61
=12ⅹ61
=732
=(13-1)ⅹ61
=12ⅹ61
=732
第4个回答 2021-03-18
13 x61-1x61
=（13-1）×61
=12×61
=（10+2）x61
=10x61+2x61
=610+122
=732
或者
13x61-1x61
=（13-1）×61
=12×61
=12x(60+1)
=12x60+12
=720+12
=732
=（13-1）×61
=12×61
=（10+2）x61
=10x61+2x61
=610+122
=732
或者
13x61-1x61
=（13-1）×61
=12×61
=12x(60+1)
=12x60+12
=720+12
=732
第5个回答 2021-03-18
13x61-1x61
=（13-1）x61
=12x61
=732
=（13-1）x61
=12x61
=732
