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Standard 5.N.3 - Practice division word problems with divisors up to 100.

Included Skills:

Apply mental mathematics strategies and number properties in order to understand and recall basic multiplication facts (multiplication tables) to 81 and related division facts.
Describe the mental mathematics strategy used to determine a given basic fact, such as:
- skip count up by one or two groups from a known fact; e.g., if 5 × 7 = 35, then 6 × 7 is equal to 35 + 7 and 7 × 7 is equal to 35 + 7 + 7.
- skip count down by one or two groups from a known fact; e.g., if 8 × 8 = 64, then 7 × 8 is equal to 64 – 8 and 6 × 8 is equal to 64 – 8 – 8.
- doubling; e.g., for 8 × 3 think 4 × 3 = 12, and 8 × 3 = 12 + 12.
- patterns when multiplying by 9; e.g., for 9 × 6, think 10 × 6 = 60, and 60 – 6 = 54; for 7 × 9, think 7 × 10 = 70, and 70 – 7 = 63.
- repeated doubling; e.g., if 2 × 6 is equal to 12, then 4 × 6 is equal to 24 and 8 × 6 is equal to 48.
- repeated halving; e.g., for 60 ÷ 4, think 60 ÷ 2 = 30 and 30 ÷ 2 = 15.
Explain why multiplying by zero produces a product of zero (zero property of multiplication).
Explain why division by zero is not possible or is undefined; e.g., 8 ÷ 0.
Determine, with confidence, answers to multiplication facts to 81 and related division facts.
Demonstrate understanding, recall/memorization and application of multiplication and related division facts to 9 × 9.

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