题目内容
列式计算:
①一个数的
是
,这个数是多少?
②2加上一个数的
恰好与
同样多,求这个数.
③化简比并求比值:
24:180.75:0.450.6:
:
④解方程:
X=
X+
=
:X=
.
①一个数的
| 5 |
| 8 |
| 1 |
| 12 |
②2加上一个数的
| 1 |
| 3 |
| 7 |
| 18 |
③化简比并求比值:
24:180.75:0.450.6:
| 4 |
| 5 |
| 8 |
| 21 |
| 5 |
| 14 |
④解方程:
| 5 |
| 24 |
| 5 |
| 6 |
| 5 |
| 9 |
| 1 |
| 12 |
| 1 |
| 9 |
| 7 |
| 8 |
| 3 |
| 4 |
①
÷
=
;
答:这个数是
.
②设这个数是x,
2+
x=
,
2+
x-2=
-2,
x=-
,
x×3=-
×3
x=-
;
③24:18=(24÷6):(18÷6)=4:3
24:18=24÷18=
;
0.75:0.45=(0.75×100):(0.45×100)=75:45=5:3,
0.75:0.45=0.75÷0.45=
,
0.6:
=0.6:0.8,=6:8=3:4,
0.6:
=0.6÷0.8=
:
=(
×42):(
×42)=16:15,
:
=
÷
=
④
x=
,
x÷
=
÷
,
x=4;
x+
=
,
x+
-
=
-
,
x=
,
x÷
=
÷
,
x=
;
:x=
,
3x=
×4,
3x÷3=
×4×
,
x=
.
| 1 |
| 12 |
| 5 |
| 8 |
| 2 |
| 15 |
答:这个数是
| 2 |
| 15 |
②设这个数是x,
2+
| 1 |
| 3 |
| 7 |
| 18 |
2+
| 1 |
| 3 |
| 7 |
| 18 |
| 1 |
| 3 |
| 29 |
| 18 |
| 1 |
| 3 |
| 29 |
| 18 |
x=-
| 29 |
| 6 |
③24:18=(24÷6):(18÷6)=4:3
24:18=24÷18=
| 4 |
| 3 |
0.75:0.45=(0.75×100):(0.45×100)=75:45=5:3,
0.75:0.45=0.75÷0.45=
| 5 |
| 3 |
0.6:
| 4 |
| 5 |
0.6:
| 4 |
| 5 |
| 3 |
| 4 |
| 8 |
| 21 |
| 5 |
| 14 |
| 8 |
| 21 |
| 5 |
| 14 |
| 8 |
| 21 |
| 5 |
| 14 |
| 8 |
| 21 |
| 5 |
| 14 |
| 16 |
| 15 |
④
| 5 |
| 24 |
| 5 |
| 6 |
| 5 |
| 24 |
| 5 |
| 24 |
| 5 |
| 6 |
| 5 |
| 24 |
x=4;
| 5 |
| 9 |
| 1 |
| 12 |
| 1 |
| 9 |
| 5 |
| 9 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 9 |
| 1 |
| 12 |
| 5 |
| 9 |
| 1 |
| 36 |
| 5 |
| 9 |
| 5 |
| 9 |
| 1 |
| 36 |
| 5 |
| 9 |
x=
| 1 |
| 20 |
| 7 |
| 8 |
| 3 |
| 4 |
3x=
| 7 |
| 8 |
3x÷3=
| 7 |
| 8 |
| 1 |
| 3 |
x=
| 7 |
| 6 |
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