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