This Grade 1 worksheet shows first graders that the order of addends does not change the sum. Students trace words including equal, same, swap, and flip, then complete fill-in problems proving 2+3+4 equals 4+3+2. Three true or false questions reinforce the commutative property idea at a first grade level. Ideal for building flexible thinking before moving on to harder three-number addition with bigger sums.
Style:
Adding Three Numbers
Part A: Trace the Words
Trace each word carefully by following the dotted lines.
1. equal
2. same
3. swap
4. any
5. flip
6. group
Part B: Fill in the Blank
Write the missing word or number on each line.
1. 2 + 3 + 4 = 9. So 4 + 3 + 2 = 9
2. 1 + 5 + 2 = 8. So 5 + 2 + 1 = 8
3. 6 + 2 + 1 = 9. So 1 + 2 + 6 = 9
4. 3 + 3 + 4 = 10. So 4 + 3 + 3 = 10
Part C: True or False?
Read each statement. Circle True or False.
1. 2 + 3 + 5 gives the same sum as 5 + 3 + 2.
True False
2. 4 + 1 + 2 is more than 2 + 1 + 4.
True False
3. We can add 3 numbers in any order.
True False
Adding Three Numbers
★ Part A: Trace the Words
Trace each word carefully by following the dotted lines.
1) equal
2) same
3) swap
4) any
5) flip
6) group
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) 2 + 3 + 4 = 9. So 4 + 3 + 2 = 9
2) 1 + 5 + 2 = 8. So 5 + 2 + 1 = 8
3) 6 + 2 + 1 = 9. So 1 + 2 + 6 = 9
4) 3 + 3 + 4 = 10. So 4 + 3 + 3 = 10
★ Part C: True or False?
Read each statement. Circle True or False.
1) 2 + 3 + 5 gives the same sum as 5 + 3 + 2.
True
False
2) 4 + 1 + 2 is more than 2 + 1 + 4.
True
False
3) We can add 3 numbers in any order.
True
False
Ready to Practice?
Complete each section carefully.
13 Questions
15-20 minutes
Auto-graded
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