Carl wants to find the product 30*56. Which of the following best explains how he can find the product mentally? A. He knows that 30:5 is 6. He then multiplies 6 by 6 to get 36. B. He knows that 30*66 is 30. He then subtracts 1 from 30 to get 29. C. He knows that 3*6=18. He then adds 18 and 5 to get 23. D. He knows that 30*16 is 5. He then multiplies 5 by 5 to get 25.
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