19+99乘以99簡便計算
19+99x99x1
二點三乘以0.99簡便計算
2.3×0.99
=2.3×(1-0.01)
=2.3×1-2.3×0.01
=2.3-0.023
=2.277
九十九又二十五分之二十四乘負五等於幾
助人為樂呀
(99又24/25)×(-5)
=(100-1/25)×(-5)
=-500+1/5
=-499-4/5
=-499又4/5
-(99又25分之24乘以5等於多少?