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Grade 3 Math · World 3: Multiplication Meadow · Level 31
Facts with 7, 8, and 9
Break apart, double the 4s for 8s, and use 10s minus one group for 9s.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 31
- 9s are 10s minus one group. 9 × 6 is 10 × 6, which is 60, minus 6: 54.
- 8s are double 4s. 8 × 7 is double 4 × 7: double 28 is 56.
- 7s break into 5s and 2s. 7 × 6 is 5 × 6 plus 2 × 6: 30 plus 12 is 42.
Georgia's K-12 Mathematics Standards:
- 3.PAR.3.2 — Represent single digit multiplication and division facts using a variety of strategies. Explain the relationship between multiplication and division.
- 3.PAR.3.3 — Apply properties of operations (i.e., commutative property, associative property, distributive property) to multiply and divide within 100.