Math Drills
Addition and Subtraction
C-2Word Problems
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What this worksheet covers
- Topic
- Rounding Numbers
- Worksheet
- Addition and Subtraction
Three tiers are written one after another: the original expression, the rounded expression, and its answer. From Addition (1 Significant Digit) to Addition (To the Ten Thousands Place) a sum is estimated with the rounding place shifting, and from Subtraction (To the Hundreds Place) onward the same is done with a difference. Besides single-line working, Addition (Word Problems) and Subtraction (Word Problems) read scenes of population and weight.
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An estimate rounds before it adds. Work the true answer out first and round afterwards and the result looks close enough to pass unnoticed. The clue is the middle tier, where every figure should carry nothing but zeros below the place named. Original figures left standing there mean the rounding was put off until later.
The hand that rounded a single number in Rounding now turns on each figure inside an expression. In Multiplication and Division the rounding place narrows to one significant digit alone and the signs change to multiplying and dividing.
- Addition (Word Problems)2 questions
- Subtraction (Word Problems)2 questions
Questions & answers
Problems and answers on this worksheet
These are the problems in “Rounding Numbers”, shown with their answers.
(1)Henry went on a factory tour. Factory A made 5678 items and Factory B made 4321 items. About how many did they make in all? Round each number to the thousands place, then add the rounded numbers to find the answer. Answer □
Answer: 10000items
(2)Noah counted the fruit at a fruit shop. There are 485 apples and 672 oranges. About how many are there in all? Round each number to the hundreds place, then add the rounded numbers to find the answer. Answer □
Answer: 1200fruits
(3)The population of the large country is 678901 people and the population of the small country is 234567 people. About how many more people are in the large country than the small country? Round to the ten-thousands place to find the rounded number. Answer □
Answer: 450000people
(4)At the concert Olivia watched, 15234 adults and 8765 children came. About how many more adults were there than children? Round to the thousands place to find the rounded number. Answer □
Answer: 6000people
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)
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)
Rounding Numbers ReviewRounding Numbers Review Word Problems
