Addition Drills (3s) - Math Worksheet With Answer Key
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1
2Name:
Addition Drills (3s)
Solve each problem.
5
8
9
10
2
6
7
3
1
4
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
8
11
12
13
5
9
10
6
4
7
3
3
3
3
3
3
3
3
3
3
+
10
+
1
+
5
+
9
+
7
+
6
+
8
+
2
+
3
+
4
13
4
8
12
10
9
11
5
6
7
3
4
7
8
9
2
6
10
5
1
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
6
7
10
11
12
5
9
13
8
4
3
3
3
3
3
3
3
3
3
3
+
8
+
5
+
6
+
1
+
10
+
2
+
4
+
3
+
9
+
7
11
8
9
4
13
5
7
6
12
10
8
6
5
3
2
1
9
10
4
7
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
11
9
8
6
5
4
12
13
7
10
3
3
3
3
3
3
3
3
3
3
+
2
+
1
+
8
+
6
+
4
+
3
+
10
+
5
+
9
+
7
5
4
11
9
7
6
13
8
12
10
5
2
8
3
4
7
10
9
1
6
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
8
5
11
6
7
10
13
12
4
9
3
3
3
3
3
3
3
3
3
3
+
10
+
9
+
5
+
7
+
6
+
2
+
4
+
3
+
1
+
8
13
12
8
10
9
5
7
6
4
11
6
10
3
2
4
5
1
8
7
9
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
9
13
6
5
7
8
4
11
10
12
3
3
3
3
3
3
3
3
3
3
+
2
+
8
+
6
+
7
+
4
+
5
+
3
+
10
+
1
+
9
5
11
9
10
7
8
6
13
4
12
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2
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