Math Drills
Rounding Numbers Review
D-1Word Problems
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What this worksheet covers
- Topic
- Rounding Numbers
Rounding to reach an approximate figure is practiced across shifting places: To the Tens Place, To the Hundreds Place, To the Thousands Place and To 2 Significant Digits. From there the work moves to estimating sums, differences, products and quotients from rounded numbers, and applies the same idea in word problems.
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The most frequent error is rounding off the hundreds digit itself when told to round to the hundreds place, a mix-up over which place to act on. One zero too many or too few at the end of the answer reveals it. With 2 significant digits, numbers containing a 0 throw off where the counting starts, and the rounding lands one place early.
Before parentheses arrive as something new in Rules of Calculation, the skill of treating a number as approximate gets finished off here. The quotient-guessing built up in Division by 2-Digit Numbers is reorganized into formal rounding rules for estimating the answer to any of the four operations. That rounding skill is called on again in grade 5, when Division of Decimals asks for an answer given as an approximate figure.
- Addition and Subtraction · Addition (Word Problems)1 question
- Addition and Subtraction · Subtraction (Word Problems)1 question
- Multiplication and Division · Multiplication (Word Problems)1 question
- Multiplication and Division · Division (Word Problems)1 question
Questions & answers
Problems and answers on this worksheet
These are the problems in “Rounding Numbers”, shown with their answers.
(1)At the concert Sam watched, 12567 adults and 8234 children came. About how many came in all? Round each number to the thousands place, then add the rounded numbers to find the answer. Answer □
Answer: 21000people
(2)The number of cars produced was 9876 this year and 5432 last year. About how many more were made this year than last year? Round to the hundreds place to find the rounded number. Answer □
Answer: 4500cars
(3)At the bakery Grace goes to, 183 loaves of bread are sold in 1 day. About how many will be sold in 47 days? Calculate using the rounded number to 1 digit from the left. Answer □
Answer: 10000loaves
(4)The library has 8732 books. If they are borrowed equally among 87 people, about how many will each 1 person get? Round to 1 digit from the left to get the rounded number, then find the answer. Answer □
Answer: 100books
What to do next
More worksheets in this unit
RoundingRounding Calculation (Thousands or Top 2 Digits)
Addition and SubtractionAddition and Subtraction Calculation (Thousands or Ten-Thousands)
Addition and SubtractionAddition and Subtraction Calculation (Hundreds or Top 1 Digit)
Addition and SubtractionAddition and Subtraction Word Problems
Multiplication and DivisionMultiplication and Division Calculation (Multiplication)
Multiplication and DivisionMultiplication and Division Calculation (Division)
Multiplication and DivisionMultiplication and Division Word Problems
Rounding Numbers ReviewRounding Numbers Review Calculation (Rounding)
Rounding Numbers ReviewRounding Numbers Review Calculation (Addition and Subtraction)
Rounding Numbers ReviewRounding Numbers Review Calculation (×, ÷, and More)
