把下列算式巧算:6.66乘1.3加3.

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把下列算式巧算:6.66乘1.3加3.把下列算式巧算:6.66乘1.3加3.把下列算式巧算:6.66乘1.3加3.原式=6.66*1.3+3=6.66*(1+0.3)+3=6.66+1.998+3=1

把下列算式巧算:6.66乘1.3加3.
把下列算式巧算:6.66乘1.3加3.

把下列算式巧算:6.66乘1.3加3.
原式=6.66*1.3+3
=6.66*(1+0.3)+3
=6.66+1.998+3
= 11.658

6.66×1.3+3=3×(2.22×1.3+1)=3×(2.886+1)=3×3.886=11.658

三分之二十*1.3+3=11.66,约等于