3.25÷3.9×7.8简便运算怎么做

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3.25÷3.9×7.8简便运算怎么做
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3.25÷3.9×7.8简便运算怎么做
3.25÷3.9×7.8简便运算怎么做

3.25÷3.9×7.8简便运算怎么做
3.25÷3.9×7.8
=3.25*(7.8÷3.9)
=3.25*2
=6.5

3.25÷3.9×7.8
= 3.25×7.8÷3.9
= 3.25×2
= 6.5