Math Drills
Addition and Subtraction (Subtract → Add)
C-3Word Problems
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What this worksheet covers
- Worksheet
- Addition and Subtraction (Subtract → Add)
Only one arrangement appears: subtraction first, addition afterwards. Working from the front settles the answer, whereas gathering the last two numbers together first changes it. How much that order matters is confirmed again and again in the calculations, in Fill in the Blank and in Word Problems built from a scene.
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Doing the addition at the end first, then taking that sum away in one piece, is what stands out. A result smaller than the true figure marks it. Ringing the first two numbers before starting prevents it, and in Fill in the Blank the sign standing in front of the box goes unseen and an addition is done instead.
Nothing has moved but the arrangement, so the way of checking matches Addition and Subtraction (Add → Subtract). The unit finishes with Order and Strategy, which takes up the cases where the order may legitimately be changed.
- Word Problems6 questions
Questions & answers
Problems and answers on this worksheet
These are the problems in “3-Number Calculations”, shown with their answers.
(1)At kindergarten there are 30 origami sheets. 1 was used for crafts. Then the teacher gave 7 more. How many are there now? Answer □
Answer: 36sheets
(2)In the field, 17 strawberries were harvested. 8 were eaten as a snack. Then the field next door gave 2 more. How many are there now? Answer □
Answer: 11strawberries
(3)At the flower shop there are 15 flowers. 5 were used for a bouquet. Then 3 more were newly delivered. How many are there now? Answer □
Answer: 13flowers
(4)In Olivia's gym bag there are 22 balls. 4 were used in practice. Then the coach gave 5 more. How many are there now? Answer □
Answer: 23balls
(5)On the birthday party table there are 22 cookies. Everyone ate 9. Then Mom gave 9 more. How many are there now? Answer □
Answer: 22cookies
(6)At the school stationery corner there are 22 erasers. 8 were used in class. Then the store gave 7 more. How many are there now? Answer □
Answer: 21erasers
What to do next
More worksheets in this unit
Adding 3 NumbersAdding 3 Numbers Column Calculation (1 Carry)
Adding 3 NumbersAdding 3 Numbers Column Calculation (2 Carries)
Adding 3 NumbersAdding 3 Numbers Calculation
Adding 3 NumbersAdding 3 Numbers Fill in the Blank
Adding 3 NumbersAdding 3 Numbers Word Problems
Subtracting 3 NumbersSubtracting 3 Numbers Calculation
Subtracting 3 NumbersSubtracting 3 Numbers Fill in the Blank
Subtracting 3 NumbersSubtracting 3 Numbers Word Problems
Addition and Subtraction (Add → Subtract)Addition and Subtraction (Add → Subtract) Calculation
Addition and Subtraction (Add → Subtract)Addition and Subtraction (Add → Subtract) Fill in the Blank
Addition and Subtraction (Add → Subtract)Addition and Subtraction (Add → Subtract) Word Problems
Addition and Subtraction (Subtract → Add)Addition and Subtraction (Subtract → Add) Calculation
Addition and Subtraction (Subtract → Add)Addition and Subtraction (Subtract → Add) Fill in the Blank
Order and StrategyOrder and Strategy Calculation (Addition Strategy)
Order and StrategyOrder and Strategy Calculation (Subtraction Strategy)
Order and StrategyOrder and Strategy Calculation (Addition and Subtraction Strategy)
Order and StrategyOrder and Strategy Word Problems
3-Number Calculations Review3-Number Calculations Review Column Calculation (Addition)
3-Number Calculations Review3-Number Calculations Review Calculation
3-Number Calculations Review3-Number Calculations Review Fill in the Blank
3-Number Calculations Review3-Number Calculations Review Calculation (Strategy)
3-Number Calculations Review3-Number Calculations Review Word Problems
