(3.14×7.42+2.58×3.14)÷(3.25+3.14-31/4).

问题描述:

(3.14×7.42+2.58×3.14)÷(3.25+3.14-3

1
4
).

(3.14×7.42+2.58×3.14)÷(3.25+3.14-3

1
4
),
=(7.42+2.58)×3.14÷(3.25-3
1
4
+3.14),
=10×3.14÷3.14,
=31.4÷3.14,
=10.