内容正文:
单元 4 第 1 课时 比例的意义(教材 P40)
6 年级 下 R
求比值。
35∶ 5 = 0. 8∶ 4 = 35 ∶ 0. 2 = 9∶
3
4 =
1. 5∶ 23 = 49∶ 7 = 2. 6∶ 2 =
7
10∶
3
10 =
60∶ 3 = 2. 4∶ 25 = 4. 5∶ 0. 5 = 120∶ 60 =
5
12∶
5
6 = 6. 4∶ 0. 8 =
9
14∶
3
7 = 0. 03∶ 6 =
12∶ 48 = 12 ∶
1
3 =
1
2 ∶
3
4 = 0. 8∶ 4 =
4∶ 2. 4 = 35 ∶
5
3 = 1. 5∶ 7. 5 = 0. 12∶ 0. 15 =
5
6 ∶ 4 =
4
7 ∶
1
2 = 12∶
3
5 = 3. 2∶ 2. 8 =
8
5 ×
2
3 ÷
8
5 ×
2
3 (
2
9 +
5
18) ÷
1
9 (
3
4 +
1
2 -
7
12) × 36
1 - 0. 25x = 34
2
3 x +
1
2 x =42
3
4 x ÷
1
2 =
6
5
72
单元 4 第 2 课时 比例的基本性质(教材 P41)
6 年级 下 R
化简比。
9∶ 12 = 1. 25∶ 0. 5 = 1516∶ 5 = 560∶ 80 =
8∶ 45 =
9
16∶
3
4 = 0. 24∶ 0. 6 =
3
5 ∶
3
4 =
0. 7∶ 4. 2 = 0. 12∶ 1 = 35 ∶ 0. 3 =
8
35∶
16
21 =
1. 3∶ 25 =
3
5 ∶ 0. 6 =
18
25∶ 9 = 0. 375∶
7
8 =
0. 75∶ 15 = 4. 8∶ 12 = 23 ∶
8
9 =
9
10∶
3
5 =
3. 4∶ 1. 7 = 712∶
1
6 = 2. 7∶ 0. 3 =
4
15∶
2
5 =
0. 24∶ 0. 6 = 1. 6∶ 89 = 24∶
3
8 =
8
9 ∶
2
3 =
8
13 ÷ 7 +
1
7 ×
5
13 1 - (
3
4 -
3
8 ) ×
4
27
5
6 × (
7
10 +
4
5 ) ÷ 1. 5
4
5 x -
2
3 x =
2
5
2
3 x +0. 25x =
1
6 x +
2
3 x =
5
2
82
单元 4 第 3 课时 解比例(1)(教材 P42)
6 年级 下 R
求比值。
0. 4∶ 23 = 3. 2∶
4
5 =
1
3 ∶
1
5 =
1
3 ∶
5
12 =
85∶ 1. 7 = 1011∶
8
9 = 2. 1∶ 0. 7 =
3
4 ∶
1
9 =
0. 8∶ 710 = 0. 7∶ 0. 35 = 15∶ 0. 75 =
4
7 ∶
5
6 =
7
18∶ 0. 4 =
4
5 ∶
7
8 = 0. 6∶
2
3 = 0. 2∶ 1. 4 =
8
15∶ 0. 125 = 12∶
1
3 = 45∶ 1. 5 = 24∶ 30 =
3
5 ∶
2
3 = 0. 5∶ 0. 8 =
3
5 ∶
2
15 = 0. 5∶
1
2 =
36∶ 18 = 14 ∶ 0. 75 = 0. 625∶
3
8 =
3
8 ∶
2
9 =
5
8 ∶
3
16 = 12∶
3
5 = 2. 4∶
4
5 = 45∶
9
10 =
4∶ x =5∶ 34
15
7 =
5
x 7∶ 3 = x∶
2
9
1. 4∶ 21 = x∶ 10 25 ∶ x =1. 6∶ 1. 5
3. 5
9. 2 =
10. 5
x
92
单元 4 第 4 课时 解比例(2)(教材 P42)
6 年级 下 R
化简比。
10∶ 36 = 2. 8∶ 0. 07 = 23 ∶ 1. 5 =
3
5 ∶ 0. 2 =
6
5 ∶
3
2 =
1
4 ∶ 0. 75 = 4∶
1
20 =
9
16∶ 9 =
0. 25∶ 2 = 34 ∶