题目内容
| 4
| ||||||||||
(
| 3.12÷1.2-1.2×0.6; | ||||||||||
| 1998+7650÷75; | (1
|
(1)
×3.25+9
×3
=
×3.25+9
×3.25
=(
+9
)×3.25
=10×3.25
=32.5;
(2)4
-(1
+0.625)
=4
-1
-0.625
=(4
-1
)-0.625
=3-0.625
=2.375;
(3)(
+
)×(4-2
)
=
×
=
;
(4)3.12÷1.2-1.2×0.6
=2.6-0.72
=1.88;
(5)1998+7650÷75
=1998+102
=2100;
(6)(1
+2
)÷(1
×0.8-0.3)
=
÷(1-0.3)
=
÷0.7
=
÷
=
×
=
.
| 4 |
| 9 |
| 5 |
| 9 |
| 1 |
| 4 |
=
| 4 |
| 9 |
| 5 |
| 9 |
=(
| 4 |
| 9 |
| 5 |
| 9 |
=10×3.25
=32.5;
(2)4
| 5 |
| 17 |
| 5 |
| 17 |
=4
| 5 |
| 17 |
| 5 |
| 17 |
=(4
| 5 |
| 17 |
| 5 |
| 17 |
=3-0.625
=2.375;
(3)(
| 2 |
| 5 |
| 1 |
| 2 |
| 2 |
| 3 |
=
| 9 |
| 10 |
| 4 |
| 3 |
=
| 6 |
| 5 |
(4)3.12÷1.2-1.2×0.6
=2.6-0.72
=1.88;
(5)1998+7650÷75
=1998+102
=2100;
(6)(1
| 1 |
| 4 |
| 5 |
| 6 |
| 1 |
| 4 |
=
| 49 |
| 12 |
=
| 49 |
| 12 |
=
| 49 |
| 12 |
| 7 |
| 10 |
=
| 49 |
| 12 |
| 10 |
| 7 |
=
| 35 |
| 6 |
练习册系列答案
相关题目