Estimate using general rule and subtract
a.28,292-21,496
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Therefore, estimate of 28,292 – 21,496 is equal to 7,000 according to the general rule. Therefore, estimate of 478-312 is equal to 200 according to the general rule. Therefore, estimate of 425+675 is equal to 1100 according to the general rule.
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Therefore, estimate of 28,292 – 21,496 is equal to 7,000 according to the general rule. Therefore, estimate of 478-312 is equal to 200 according to the general rule. Therefore, estimate of 425+675 is equal to 1100 according to the general rule.
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