1) What does 37 + 21= when rounded a) 50 b) 60 c) 20 2) What does 56-12= when rounded a) 50 b) 60 c) 70 3) What does 73-58= when rounded a) 70 b) 60 c) 10 4) What does 87-43= when rounded a) 90 b) 50 c) 20 5) What does 16+41= when rounded a) 20 b) 60 c) 80 6) What does 29+71= when rounded a) 60 b) 80 c) 90 7) What does 82-64= when rounded a) 20 b) 80 c) 50

Addition and subtraction with estimation

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