
(3.9×5.5×3.6×6.3)÷(1x3×5x7x0.9×1.1×1.3)简便运算
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(3.9×5.5×3.6×6.3)÷(1x3×5x7x0.9×1.1×1.3)
=(3.9÷1.3)×(5.5÷5÷1.1)×(3.6÷3)×(6.3÷7÷0.9)
=3×1×1.2×1
=3.6
=(3.9÷1.3)×(5.5÷5÷1.1)×(3.6÷3)×(6.3÷7÷0.9)
=3×1×1.2×1
=3.6
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