15/16×1/5-1/5÷15/16这道题怎么算?
2个回答
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解:15/16×1/5-1/5÷15/16等于( -31/1200 )
∵已知需求出15/16×1/5-1/5÷15/16等于多少
∴15/16 × 1/5 - 1/5 ÷ 15/16
= (3×5)/16 × 1/5 - 1/5 × 16/15
= 3/16 - 16/75
= (3×75)/(16×75)- (16×16)/(75×16)
= 225/1200 - 256/1200
= -31/1200
答:15/16×1/5-1/5÷15/16等于-31/1200
∵已知需求出15/16×1/5-1/5÷15/16等于多少
∴15/16 × 1/5 - 1/5 ÷ 15/16
= (3×5)/16 × 1/5 - 1/5 × 16/15
= 3/16 - 16/75
= (3×75)/(16×75)- (16×16)/(75×16)
= 225/1200 - 256/1200
= -31/1200
答:15/16×1/5-1/5÷15/16等于-31/1200
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