Question: A student is asked to add 50 + 30. Without writing anything, the student thinks, I know that 5 + 3 = 8, so 50

A student is asked to add 50 + 30. Without writing anything, the student thinks, "I know that 5 + 3 = 8, so 50 + 30 = 80." Which mental strategy is this student likely using? Group of answer choices Decomposing numbers to make the numbers easier to handle Extending a basic fact by multiplying by 10 Using compatible numbers Using the distributive property

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