5.2×3.83+5.2×7.17-5.2有什么简便算法?
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解:5.2×3.83+5.2×7.17-5.2等于( 52 )
∵已知需求出5.2×3.83+5.2×7.17-5.2等于多少
A × B - A × C = A × (B - C)
∴5.2 × 3.83 + 5.2 × 7.17 - 5.2
= 5.2 × (3.83 + 7.17 - 1)
= (5×10+2)/10 × (11 - 1)
= 52/10 × 10
= 52
答:5.2×3.83+5.2×7.17-5.2等于52
∵已知需求出5.2×3.83+5.2×7.17-5.2等于多少
A × B - A × C = A × (B - C)
∴5.2 × 3.83 + 5.2 × 7.17 - 5.2
= 5.2 × (3.83 + 7.17 - 1)
= (5×10+2)/10 × (11 - 1)
= 52/10 × 10
= 52
答:5.2×3.83+5.2×7.17-5.2等于52
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