4-1 Adding and Subtracting with like Denominators

1. paper and pencil – 6th grade math homework. 2. mental math-quick and easy. 3. calculator-complex problems. Lesson 4.8 Exact or Estimate . Exact. Questions that indicate an exact answer is needed: What is the total? How many? How much? Do you always need an exact answer? Estimate. Questions that indicate only an estimate is needed: Will ... ................
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