Math Drills
Addition and Subtraction (Subtract → Add)
C-1Word 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 the park, Sam has 18 marbles. 5 were used while playing. Then big brother gave 4 more. How many are there now? Answer □
Answer: 17marbles
(2)On Ethan's bookshelf there are 24 books. 4 were lent to a class. Then Auntie gave 5 more. How many are there now? Answer □
Answer: 25books
(3)In the school stationery drawer there are 30 erasers. 1 was used in class. Then 6 more were newly received. How many are there now? Answer □
Answer: 35erasers
(4)In the house garden, 11 strawberries were harvested. 9 were eaten for dessert. Then the neighbor gave 9 more. How many are there now? Answer □
Answer: 11strawberries
(5)In Noah's album there are 22 stickers. 4 were used for a present. Then he got 4 more at the store. How many are there now? Answer □
Answer: 22stickers
(6)In the gym there are 14 balls. 1 was used in practice. Then the coach gave 1 more. How many are there now? Answer □
Answer: 14balls
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
