题目内容
脱式计算.
| 500-100×3 | (375+125)×4 | 25×4×7 | 200÷4-21. |
500-100×3
=500-300,
=200;
(375+125)×4
=500×4,
=2000;
25×4×7
=100×7,
=700;
200÷4-21
=50-21,
=29.
=500-300,
=200;
(375+125)×4
=500×4,
=2000;
25×4×7
=100×7,
=700;
200÷4-21
=50-21,
=29.
练习册系列答案
相关题目