题目内容
脱式计算.
| 30×2+140 | 900-210×4 | (2500-400)÷3 |
| 800-300÷5 | 175+25×4 | 125×4×9. |
(1)30×2+140
=60+140
=200;
(2)900-210×4
=900-840
=60;
(3)(2500-400)÷3
=2100÷3
=700;
(4)800-300÷5
=800-60
=740;
(5)175+25×4
=175+100
=275;
(6)125×4×9
=500×9
=4500.
=60+140
=200;
(2)900-210×4
=900-840
=60;
(3)(2500-400)÷3
=2100÷3
=700;
(4)800-300÷5
=800-60
=740;
(5)175+25×4
=175+100
=275;
(6)125×4×9
=500×9
=4500.
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