如题所述
第1个回答 2020-01-03
解:8.38x1.1-8.38等于( 419/500 ),【即等于0.838】
∵已知需求出8.38x1.1-8.38等于多少
A × B - A = A × (B - 1)
∴8.38 x 1.1 - 8.38
= 8.38 × (1.1 - 1)
= (8×100+38)/100 × 0.1
= 838/100 × 1/10
= 419/50 × 1/10
= 419/500
= 0.838
答:8.38x1.1-8.38等于419/500,【即等于0.838】本回答被网友采纳
∵已知需求出8.38x1.1-8.38等于多少
A × B - A = A × (B - 1)
∴8.38 x 1.1 - 8.38
= 8.38 × (1.1 - 1)
= (8×100+38)/100 × 0.1
= 838/100 × 1/10
= 419/50 × 1/10
= 419/500
= 0.838
答:8.38x1.1-8.38等于419/500,【即等于0.838】本回答被网友采纳