"Equation", "statement using the = sign" "Mentally", "in your head" "Digit", "a number" "Number Bond", "simple addition of two numbers that add up to the whole" "Round", "making a number more simple by keeping it close to original value" "Estimate", "a number close to the exact number" "Exact", "the value of the number" "Sum", "the answer when adding numbers together" "Strategy", "your plan"
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