Grade 1 learners spot doubles inside three-addend problems like 3+3+4 and 5+5+2. Nine fill-in questions guide first graders to find the matching pair first, double it, then add the third number. A four-pair matching activity pairs expressions with their sums. This sheet helps children use memorized doubles facts as a quick starting point for bigger sums, making three-number addition feel fast, friendly, and approachable for early Grade 1 math learners.
Style:
Adding Three Numbers
Part A: Fill in the Blank
Write the missing word or number on each line.
1. 3 + 3 + 4: the doubles are 3 and 3
2. 3 + 3 + 4 = 10
3. 5 + 5 + 2 = 12
4. 4 + 4 + 3 = 11
5. 2 + 2 + 7 = 11
6. 6 + 6 + 1 = 13
7. 7 + 7 + 2 = 16
8. 1 + 4 + 4 = 9
9. 5 + 3 + 3 = 11
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
2 + 2 + 5
→ 9
9
4 + 4 + 6
→ 14
14
6 + 6 + 3
→ 15
15
5 + 5 + 8
→ 18
18
Adding Three Numbers
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) 3 + 3 + 4: the doubles are 3 and 3
2) 3 + 3 + 4 = 10
3) 5 + 5 + 2 = 12
4) 4 + 4 + 3 = 11
5) 2 + 2 + 7 = 11
6) 6 + 6 + 1 = 13
7) 7 + 7 + 2 = 16
8) 1 + 4 + 4 = 9
9) 5 + 3 + 3 = 11
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
2 + 2 + 5
→ 9
9
4 + 4 + 6
→ 14
14
6 + 6 + 3
→ 15
15
5 + 5 + 8
→ 18
18
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