72乘二点零九减一点八乘73点六的简便计算

2025-06-27 21:38:42
推荐回答(2个)
回答1:

72X2.09 - 1.8X73.6 = 72X2.09 - 18X7.36 = 18X(4X2.09 - 7.36)=18X(8.36 - 7.36)= 18

回答2:

72×2.09-1.8×73.6
=1.8×40×2.09-1.8×73.6
=1.8×83.6-1.8×73.6
=1.8×(83.6-73.6)
=1.8×10
=18