1. 直接写出得数。
10 + 3 =
19 - 2 =
11 + (
13 + 3 - 10 =
16 - 5 =
4 + 14 =
(
2 + 8 + 7 =
8 + 10 =
18 - 2 =
17 - (
13 - 2 + 5 =
17 - 4 =
8 + 11 =
3 + (
12 + 2 + 3 =
1 + 11 =
17 - 7 =
(
17 - 5 + 3 =
17 - 10 =
6 + 10 =
15 - (
11 + 4 + 4 =
9 + 10 =
19 - 5 =
3 + (
18 - 4 - 4 =
15 - 2 =
5 + 13 =
(
12 + 3 - 5 =
10 + 3 =
13
19 - 2 =
17
11 + (
2
) = 13 13 + 3 - 10 =
6
16 - 5 =
11
4 + 14 =
18
(
16
) - 10 = 6 2 + 8 + 7 =
17
8 + 10 =
18
18 - 2 =
16
17 - (
6
) = 11 13 - 2 + 5 =
16
17 - 4 =
13
8 + 11 =
19
3 + (
15
) = 18 12 + 2 + 3 =
17
1 + 11 =
12
17 - 7 =
10
(
19
) - 9 = 10 17 - 5 + 3 =
15
17 - 10 =
7
6 + 10 =
16
15 - (
3
) = 12 11 + 4 + 4 =
19
9 + 10 =
19
19 - 5 =
14
3 + (
14
) = 17 18 - 4 - 4 =
10
15 - 2 =
13
5 + 13 =
18
(
5
) + 10 = 15 12 + 3 - 5 =
10
答案:
13 17 2 6 11 18 16 17 18 16 6 16 13 19 15 17 12 10 19 15 7 16 3 19 19 14 14 10 13 18 5 10
2. 在○里填“>”“<”或“=”。
12 + 6
4 + 13
15 - 1
17 - 10
19 - 10
5 + 10
12 + 6
=
18 4 + 13
>
19 - 3 15 - 1
=
13 + 1 17 - 10
<
10 19 - 10
<
14 + 5 5 + 10
>
19 - 8
答案:
= > = < < >
| 加数 | 12 |
| :--- | :--- | :--- | :--- | :--- | :--- |
| 加数 | 5 | 3 | 14 |
| 和 |
| 被减数 | 14 |
| :--- | :--- | :--- | :--- | :--- | :--- |
| 减数 | 4 | 1 | 4 | 3 | 10 |
| 差 |
10
| 2 | 7 | 17
|| :--- | :--- | :--- | :--- | :--- | :--- |
| 加数 | 5 | 3 | 14 |
10
| 2 || 和 |
17
| 13 | 16
| 17 | 19 || 被减数 | 14 |
13
| 16 | 19
| 15 || :--- | :--- | :--- | :--- | :--- | :--- |
| 减数 | 4 | 1 | 4 | 3 | 10 |
| 差 |
10
| 12 | 12
| 16 | 5
|
答案:
17 10 16 10 17 10 13 12 19 5
☆ + ☆ + ☆ + △ + △ = 13
☆ = (
☆ + ☆ + △ + △ = 10
△ = (
☆ = (
3
) ☆ + ☆ + △ + △ = 10
△ = (
2
)
答案:
3 2
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