Addition
Write the missing number and complete each addition sentence.
1)
15
+
= 20
2)
+
19
= 20
3)
17
+
= 20
4)
+
10
= 20
5)
18
+
= 20
6)
+
4
= 20
7)
20
+
= 20
8)
+
6
= 20
9)
2
+
= 20
10)
+
12
= 20
11)
9
+
= 20
12)
+
1
= 20
13)
3
+
= 20
14)
+
16
= 20
15)
0
+
= 20
16)
+
14
= 20
17)
2
+
= 20
18)
+
5
= 20
19)
13
+
= 20
20)
+
8
= 20
21)
11
+
= 20
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