Math Drills
Addition and Subtraction
C-3Word 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)Hannah counted flowers at the park. There are 1856 white flowers and 2473 red flowers blooming. About how many are blooming in all? Round each number to the hundreds place, then add the rounded numbers to find the answer. Answer □
Answer: 4400flowers
(2)At the sports day, the red team scored 4567 points and the white team scored 3892 points. About how many points are there in total? Round each number to the thousands place, then add the rounded numbers to find the answer. Answer □
Answer: 9000points
(3)At the amusement park Grace visited, there were 6789 visitors. Of them, 2345 went home. About how many are left? Round to the hundreds place to find the rounded number. Answer □
Answer: 4500people
(4)According to a survey of the area where Riley lives, 4321 people live in the east area and 2789 people live in the west area. About how many more people are in the east area than the west area? Round to the hundreds place to find the rounded number. Answer □
Answer: 1500people
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
