🔢 Mathematics · Number Representation & Place Value
Estimating by rounding
Use approximation through rounding to estimate answers and calculate possible resulting errors expressed using inequality notation a < x ≤ b; understand upper and lower bounds of rounded values
Typical age: 12–14 years
“If a length is measured as 7 cm to the nearest cm, can your child say the actual length could be anywhere from 6.5 cm to 7.5 cm — understanding that rounding creates a range of possible values?”
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