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7800ᠧ39÷50简便方法？

2025-03-25 07:01:28

推荐回答（4个）

回答1：

=7800÷50x39=156x39=156x(40一1)=156x40一156=6240一156=6084

回答2：

7800×39÷50
=7800×39×2÷2÷50
=7800×(39×2)÷(50×2)
=7800×78÷100
=7800÷100×78
=78×78
=6084

回答3：

7800×39÷50
=7800÷50×39
=156×39
=6084

回答4：

7800×39÷50
＝7800÷50×39
＝(7800×2)÷(50×2)×39
＝15600÷100×(40－1)
＝156×40-156×1
＝6240-156
＝6084

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