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Grade 5 Math Β· World 2: Multiplication Mountain Β· Level 14

Choose a Strategy

Pick the method that fits the numbers, such as 25 Γ— 48.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

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What children learn in Level 14

  • Good mathematicians look at the numbers before they pick a method. Take 25 times 48. Four 25s make 100, and 48 has 12 fours.
  • Try 199 times 20. 200 times 20 is 4,000, and that's one 20 too many.
  • Try 45 times 18. Double one number and halve the other. The answer doesn't change.
  • If the numbers aren't friendly, an area model or the standard algorithm is a fine choice. The best method is one that's accurate and makes sense to you.

Georgia's K-12 Mathematics Standards:

  • 5.NR.2.1 β€” Fluently multiply multi-digit (up to 3-digit by 2-digit) whole numbers to solve authentic problems.

Browse all Pre-K to Grade 5 standards β†’