Estimating answers

Maths

Rounding and Estimating

Which calculation would we do to estimate the answer to 467 ÷ 0.48?

3. Estimate the answer to 273 ÷ (0.64 + 0.853)

Which of the following calculations would have as estimated answer of 1000?

5. Would the estimate for 743 x 3299 be an overestimate or an underestimate?

What is the upper bound of 21 cm rounded to the nearest centimetre?

The population of Yorkshire is 5 400 000 to two significant figures, what is the greatest possible number of people who live in Yorkshire?

What is the lower bound for 120, rounded to the nearest 5?

A rectangle has sides of 5.6 cm and 8.4 cm rounded to the nearest millimetre. What is the lower bound for the perimeter?

The side length of a square is rounded to the nearest tenth of a centimetre and used to calculate its area  of 38.44 cm². What is the lower bound for the perimeter of the square?

This lesson will be removed by end of Summer Term 2025.

Estimating answers

Lesson outcome

This lesson will be removed by end of Summer Term 2025.