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Grade 5 Math · World 2: Multiplication Mountain · Level 10
Multiplying Review
Warm up with 2-digit by 2-digit area models from Grade 4.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 10
- Welcome to Multiplication Mountain! Let's warm up with a climb you know. In Grade 4, you split 39 times 15 into four parts.
- Each part is an easy fact. Add the four parts, and you have the answer.
- The total is 585. The area model works because each digit is really a place value: 39 is 30 and 9, and 15 is 10 and 5.
- Up here, we'll use the same idea with bigger numbers. No need to hurry. Flexible, careful thinking matters more than speed.
Georgia's K-12 Mathematics Standards:
- 5.NR.2.1 — Fluently multiply multi-digit (up to 3-digit by 2-digit) whole numbers to solve authentic problems.