9乘6.7+6.7乘4.

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9乘6.7+6.7乘4.9乘6.7+6.7乘4.9乘6.7+6.7乘4.5.9×6.7+6.7×4.1=6.7×(5.9+4.1)=6.7×10=676.7(5.9+4.1)=67(5.9+4.1)*

9乘6.7+6.7乘4.
9乘6.7+6.7乘4.

9乘6.7+6.7乘4.
5.9×6.7+6.7×4.1
=6.7×(5.9+4.1)
=6.7×10
=67

6.7(5.9+4.1)=67

(5.9+4.1)*6.7=67

5.9×6.7+6.7×4.1
=6.7×(5.9+4.1)
=67
(乘法分配率)

5.9×6.7+6.7×4.1
=6.7×(5.9+4.1)
=6.7×10
=67

提公因式6.7*(5.9+4.1)=67