题目内容
脱式计算:
| 402-[170-(169-135)] | 72÷[2×(105-87)]. |
(1)402-[170-(169-135)],
=402-[170-34],
=402-136,
=266;
(2)72÷[2×(105-87)],
=72÷[2×18],
=72÷36,
=2.
=402-[170-34],
=402-136,
=266;
(2)72÷[2×(105-87)],
=72÷[2×18],
=72÷36,
=2.
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