题目内容

【题目】(能简便的要用简便方法计算.

6.3×8.7+8.7×3.7

+)×12

÷3

0.625×(8.3﹣2.5×0.12)

×+÷

÷[×(+]

【答案】6.3×8.7+8.7×3.7=87;

+)×12=5;

÷3=6

0.625×(8.3﹣2.5×0.12)=5;

+=5;

÷[×(+]=

【解析】

试题分析:(1)根据乘法分配律来解答;

(2)根据乘法分配律,将括号内三项分别乘12,然后解答;

(3)根据四则混合运算顺序解答;

(4)根据四则混合运算顺序,先将括号内乘法,然后按顺序计算;

(5)先将算式后面的除法化成乘法形式,然后根据乘法分配律来解答;

(6)根据四则混合运算顺序解答.

解:6.3×8.7+8.7×3.7

=8.7×(6.3+3.7)

=8.7×10

=87;

+)×12

=

=4﹣2+3

=5;

÷3

=3×

=7﹣

=6

0.625×(8.3﹣2.5×0.12)

=0.625×(8.3﹣0.3)

=0.625×8

=5;

+

=

=

=

=5;

÷[×(+]

=÷(×

=

=

=

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