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Grade 3 Math · World 5: Ten Times Tower · Level 47
Are They Equivalent?
Compare expressions like 9 × 8 and 10 × 8 − 8.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 47
- You can compare without finding every answer. Is 9 × 8 equal to 10 × 8 − 8?
- 10 groups of 8, take away one group of 8, leaves 9 groups of 8. They're equal!
- What makes 4 × 6 = 3 × 6 + ? true? 4 groups of 6 is 3 groups of 6 plus one more 6. The missing number is 6.
Georgia's K-12 Mathematics Standards:
- 3.PAR.3.4 — Use the meaning of the equal sign to determine whether expressions involving addition, subtraction, and multiplication are equivalent.