一、我会口算。
17 + 2 =
18 - 3 =
7 + 9 =
3 + 5 =
17 + 2 =
19
13 + 6 = 19
10 - 2 - 5 = 3
19 - 6 + 4 = 17
18 - 3 =
15
17 - 6 = 11
19 - 4 - 5 = 10
12 + 7 - 3 = 16
7 + 9 =
16
16 - 5 = 11
13 + 3 - 6 = 10
3 + 4 - 5 = 2
3 + 5 =
8
15 - 3 = 12
10 - 3 + 8 = 15
18 - 2 - 4 = 12
答案:
19 19 3 17 15 11 10 16 16 11 10 2 8 12 15 12
二、数一数,填一填。

(
(
(
3
)个正方形 (4
)个三角形 (3
)个长方形(
4
)个圆 (2
)个平行四边形
答案:
3 4 3 4 2
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