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Use rounding or compatible numbers to estimate the sum. 256+321

Use rounding or compatible numbers to estimate the sum. 256+321
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Use rounding or compatible numbers to estimate the sum. 256+321

User Yuriy Chachora
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Since 256 is rounded to 260 and 321 is rounded to 320, 260+320= 580. So, 256+321 is about 580.
User Jonas Kongslund
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8.2k points
4 votes
you take 260 is close to 256, and 320 is close to 321, so 260+320=580.
About 580.
User Turkdogan Tasdelen
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8.5k points
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