3/5*14/17+8/17*14/15有简易计算方法吗?
2个回答
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解:3/5*14/17+8/17*14/15等于( 14/15 )
∵已知需求出3/5*14/17+8/17*14/15等于多少
A × B + A × C = A × (B + C)
∴3/5 * 14/17 + 8/17 * 14/15
= 3/5 × 14/17 + 8 × 1/17 × 14 × 1/15
= 3/5 × 14/17 + 14/17 × 8 × 1/15
= 14/17 × (3/5 + 8 × 1/15)
= 14/17 × (3/5 + 8/15)
= 14/17 × (9/15 + 8/15)
= 14/17 × 17/15
= 14/15
答:3/5*14/17+8/17*14/15等于14/15
∵已知需求出3/5*14/17+8/17*14/15等于多少
A × B + A × C = A × (B + C)
∴3/5 * 14/17 + 8/17 * 14/15
= 3/5 × 14/17 + 8 × 1/17 × 14 × 1/15
= 3/5 × 14/17 + 14/17 × 8 × 1/15
= 14/17 × (3/5 + 8 × 1/15)
= 14/17 × (3/5 + 8/15)
= 14/17 × (9/15 + 8/15)
= 14/17 × 17/15
= 14/15
答:3/5*14/17+8/17*14/15等于14/15
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