题目内容
| 4.2 |
| 7 |
| 54 |
| x |
| 1 |
| 8 |
| 1 |
| 3 |
| 0.25 |
| 4 |
| 4 |
| x |
x:
| 7 |
| 2 |
| 1 |
| 3 |
(1)
=
,
4.2x=54×7,
4.2x÷4.2=378÷4.2,
x=90;
(2)
:x=0.75:
,
0.75x=
×
,
0.75x÷0.75=
÷0.75,
x=
;
(3)
=
,
0.25x=4×4,
0.25x÷0.25=16÷0.25,
x=64;
(4)x:
=4:
,
x=
×4,
x÷
=14÷
,
x=42.
| 4.2 |
| 7 |
| 54 |
| x |
4.2x=54×7,
4.2x÷4.2=378÷4.2,
x=90;
(2)
| 1 |
| 8 |
| 1 |
| 3 |
0.75x=
| 1 |
| 8 |
| 1 |
| 3 |
0.75x÷0.75=
| 1 |
| 24 |
x=
| 1 |
| 18 |
(3)
| 0.25 |
| 4 |
| 4 |
| x |
0.25x=4×4,
0.25x÷0.25=16÷0.25,
x=64;
(4)x:
| 7 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 7 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
x=42.
练习册系列答案
相关题目