题目内容
脱式计算,能简算的要简算.
(1)7200÷4÷25
(2)1
+2.75+8.8+7
-10
(3)3.12×2
+2.4÷1
(4)6.5÷(1.7-0.9)+1.4÷0.4.
(1)7200÷4÷25
(2)1
| 1 |
| 5 |
| 1 |
| 4 |
| 7 |
| 15 |
(3)3.12×2
| 1 |
| 4 |
| 1 |
| 2 |
(4)6.5÷(1.7-0.9)+1.4÷0.4.
(1)7200÷4÷25,
=7200÷(4×25),
=7200÷100,
=72;
(2)1
| 1 |
| 5 |
| 1 |
| 4 |
| 7 |
| 15 |
=(1
| 1 |
| 5 |
| 1 |
| 4 |
| 7 |
| 15 |
=10+10-10
| 7 |
| 15 |
=20-10
| 7 |
| 15 |
=9
| 8 |
| 15 |
(3)3.12×2
| 1 |
| 4 |
| 1 |
| 2 |
=7.02+1.6,
=8.62;
(4)6.5÷(1.7-0.9)+1.4÷0.4,
=6.5÷0.8+1.4÷0.4,
=8.125+3.5,
=11.625.
练习册系列答案
相关题目