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.