题目内容
脱式计算
| 456-45÷9 | 280×7-942 | 854÷(56-49) |
(1)456-45÷9,
=456-5,
=451;
(2)280×7-942,
=1960-942,
=1018;
(3)854÷(56-49),
=854÷7,
=122;
=456-5,
=451;
(2)280×7-942,
=1960-942,
=1018;
(3)854÷(56-49),
=854÷7,
=122;
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