问题 解答题
梯等式计算
3
14
×[7-4÷(
2
15
+
2
3
)]
72+28÷14-14
答案

3
14
×[7-4÷(
2
15
+
2
3
)]

=

3
14
×[7-4÷
4
5
],

=

3
14
×[7-5],

=

3
14
×2,

=

3
7

72+28÷14-14

=72+2-14,

=74-14,

=60.

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