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Remember: patterns help (9s digit-sum = 9, 8s = double 4s, 6s = double 3s). The commutative property means a x b = b x a. Use these strategies when you're unsure.
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Mathematics — Multiplication Facts: 3s through 9s
Remember: patterns help (9s digit-sum = 9, 8s = double 4s, 6s = double 3s). The commutative property means a x b = b x a. Use these strategies when you're unsure.