题目内容
脱式计算,能简算的要简算
3
| 47×2.8+52×2.8+2.8 | ||||||||||||
| 37.6-4.87-1.13 | 31-[0.5×(6-5.7)+18] | ||||||||||||
9.3÷[24×(1-
| [(
|
(1)3
+3
+6
=3
+6
+3
=10+3
=13
;
(2)47×2.8+52×2.8+2.8
=2.8×(47+52+1)
=2.8×100
=280;
(3)37.6-4.87-1.13
=37.6-(4.87+1.13)
=37.6-6
=31.6;
(4)31-[0.5×(6-5.7)+18]
=31-[0.5×0.3+18]
=31-18.15
=12.85;
(5)9.3÷[24×(1-
)+3.6]
=9.3÷[24×1-24×
+3.6]
=9.3÷18.6
=0.5;
(6)[(
+
)÷
-
]÷
=[
÷
-
]÷
=[
÷
-
]÷
=[5-
]÷
=
÷
=3;
故答案为13
;280;31.6;12.85;0.5;3.
| 4 |
| 11 |
| 3 |
| 7 |
| 7 |
| 11 |
=3
| 4 |
| 11 |
| 7 |
| 11 |
| 3 |
| 7 |
=10+3
| 3 |
| 7 |
=13
| 3 |
| 7 |
(2)47×2.8+52×2.8+2.8
=2.8×(47+52+1)
=2.8×100
=280;
(3)37.6-4.87-1.13
=37.6-(4.87+1.13)
=37.6-6
=31.6;
(4)31-[0.5×(6-5.7)+18]
=31-[0.5×0.3+18]
=31-18.15
=12.85;
(5)9.3÷[24×(1-
| 3 |
| 8 |
=9.3÷[24×1-24×
| 3 |
| 8 |
=9.3÷18.6
=0.5;
(6)[(
| 3 |
| 2 |
| 8 |
| 3 |
| 5 |
| 6 |
| 7 |
| 3 |
| 8 |
| 9 |
=[
| 25 |
| 6 |
| 5 |
| 6 |
| 7 |
| 3 |
| 8 |
| 9 |
=[
| 25 |
| 6 |
| 5 |
| 6 |
| 7 |
| 3 |
| 8 |
| 9 |
=[5-
| 7 |
| 3 |
| 8 |
| 9 |
=
| 8 |
| 3 |
| 8 |
| 9 |
=3;
故答案为13
| 3 |
| 7 |
练习册系列答案
相关题目