Addition Subtraction Strategies
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Addition Subtraction Strategies
🔢 Part 1: Number Partitioning
Example: 37 + 18 = (30 + 7) + (10 + 8) = 40 + 15 = 55
a) 45 + 23 = (_____ + _____) + (_____ + _____) = _____ + _____ = _____
b) 56 + 29 = (_____ + _____) + (_____ + _____) = _____ + _____ = _____
a) 67 - 24 = _____
b) 83 - 35 = _____
↔️ Part 2: Commutative Property
a) 8 + 6 = _____ + _____
b) 15 + 7 = _____ + _____
c) 9 + 12 = _____ + _____
d) 25 + 18 = _____ + _____
For 3 + 27:
3 + 27 27 + 3For 5 + 48:
5 + 48 48 + 5📊 Part 3: Number Line Strategies
a) 34 + 16 = _____
b) 52 - 18 = _____
Problem: 46 + 27
📝 Part 4: Word Problems
a) There are 38 children in the playground. 24 more children join them. How many children are there now?
Answer: _____ children
Strategy I used: _________________________________
b) Sarah had 75 stickers. She gave away 29 stickers to her friends. How many stickers does she have left?
Answer: _____ stickers
Strategy I used: _________________________________
Answer to my problem: _____
⚡ Part 5: Quick Facts Practice
a) 7 + 8 = _____ 8 + 7 = _____ 15 - 7 = _____ 15 - 8 = _____
b) 6 + 9 = _____ 9 + 6 = _____ 15 - 6 = _____ 15 - 9 = _____
c) 8 + 8 = _____ 16 - 8 = _____
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