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X-0.24=14 x:75=12:310 15x-7x=0.15 x4=0.25.

编辑:chaxungu时间:2026-04-27 13:38:23分类:小学数学题库

X-0.24=
1
4
x:75=
1
2
3
10
15x-7x=0.15   
x
4
=0.25.

(1)X-0.24=
1
4

X-0.24+0.24=
1
4
+0.24,
X=0.49;

(2)x:75=
1
2
3
10

3
10
x=75×
1
2

3
10
x=
75
2

3
10
3
10
=
75
2
÷
3
10

x=125;

(3)15x-7x=0.15,
8x=0.15,
8x÷8=0.15÷8,
x=0.01875;

(4)
x
4
=0.25,
x
4
×4=0.25×4,
x=1.