题目内容
X:
|
|
|
| ||||||||||||||||||||
| 125×1.6= | 12.56÷6.28= | 7×
| ||||||||||||||||||||
| 3.14×5= | 3.14×40= | 75×10%= | ||||||||||||||||||||
|
(1)x:
=
:
,
x=
×
,
x×
=
×
,
x=
;
(2)
=
:30%,
x=4×30%,
x×3=1.2×3,
x=3.6;
(3)
÷
×x=
,
3x=
,
3x÷3=
÷3,
x=
;
(4)
×
=
;
(5)
÷
=
;
(6)125×1.6=200;
(7)12.56÷6.28=2;
(8)7×
÷7×
=1÷7×
,
=
×
,
=
;
(9)
-
=
,
(10)3.14×5=15.7;
(11)3.14×40=125.6;
(12)75×10%=7.5;
(13)
÷3-
=
-
,
=0.
| 5 |
| 14 |
| 3 |
| 10 |
| 7 |
| 20 |
| 7 |
| 20 |
| 5 |
| 14 |
| 3 |
| 10 |
| 7 |
| 20 |
| 20 |
| 7 |
| 3 |
| 28 |
| 20 |
| 7 |
x=
| 15 |
| 49 |
(2)
| 4 |
| X |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
x=3.6;
(3)
| 4 |
| 7 |
| 4 |
| 21 |
| 8 |
| 9 |
3x=
| 8 |
| 9 |
3x÷3=
| 8 |
| 9 |
x=
| 8 |
| 27 |
(4)
| 2 |
| 7 |
| 5 |
| 8 |
| 5 |
| 28 |
(5)
| 1 |
| 8 |
| 3 |
| 4 |
| 1 |
| 6 |
(6)125×1.6=200;
(7)12.56÷6.28=2;
(8)7×
| 1 |
| 7 |
| 1 |
| 7 |
=1÷7×
| 1 |
| 7 |
=
| 1 |
| 7 |
| 1 |
| 7 |
=
| 1 |
| 49 |
(9)
| 4 |
| 5 |
| 1 |
| 3 |
| 7 |
| 15 |
(10)3.14×5=15.7;
(11)3.14×40=125.6;
(12)75×10%=7.5;
(13)
| 1 |
| 3 |
| 1 |
| 9 |
=
| 1 |
| 9 |
| 1 |
| 9 |
=0.
练习册系列答案
相关题目