求巧算题目,急.
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求巧算题目,急.
求巧算题目,急.
求巧算题目,急.
=125×3×(41-33)
=125×3×12
=125×3×3×4
=(125×4)×9
=500×9
=4500
2)
=23×(78+47)×80
=23×125×80
=23×10000
=230000