BUILD FLUENCY. EARN YOUR ASCENT.Sign in Year 4
Choose estimates, round amounts and check whether calculations and budgets are reasonable.
Free examples and worked answers. No account needed.
Practise the method.
Choose estimates, round amounts and check whether calculations and budgets are reasonable.
Choose estimates, round amounts and check whether calculations and budgets are reasonable.
Example 1
6 craft kits cost $6.30 each. Round each price UP to the next whole dollar to allow enough money. What total budget does this give, in dollars?
Show worked answer
Answer: 42
- $6.30 rounds up to $7.
- 6× $7= $42. Rounding up leaves a buffer.
Example 2
One ball costs $79. Which is a sensible estimate for 4 balls, using the nearest ten dollars per ball?
Show worked answer
Answer: $320
- $79 rounds to $80.
- Multiply this rounded price by 4: about $320.
Example 3
6 craft kits cost $3.60 each. Round each price UP to the next whole dollar to allow enough money. What total budget does this give, in dollars?
Show worked answer
Answer: 24
- $3.60 rounds up to $4.
- 6× $4= $24. Rounding up leaves a buffer.
Put it into practice.
Sign in to choose a set, get feedback and keep your progress.