Math Drills
Mixed Addition and Subtraction Review
C-4Word Problems
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What this worksheet covers
Expressions that mix addition and subtraction appear in two shapes: add then subtract, and subtract then add. Even when the signs swap, as in 8 + 2 - 4, the work is done one step at a time from the left, and both Word Problems (with Pictures) and problems given in words alone confirm this.
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The most frequent error is overlooking the sign and adding everything, giving 14 for 8 + 2 - 4. An answer equal to the sum of all three numbers identifies this pattern. In subtract then add, children keep subtracting through the second step as well, and the answer comes out too small.
This is the first unit where a plus sign and a minus sign sit inside the same expression. Reading the expression from its left-hand end still works exactly as before, and expressions with this same shape come around again in 3-Number Calculations in grade 2.
- Add, Then Subtract · Word Problems3 questions
- Subtract Then Add: A-B+C · Word Problems3 questions
Questions & answers
Problems and answers on this worksheet
These are the problems in “Mixed Addition and Subtraction”, shown with their answers.
(1)In the river, there are 5 fish. 1 more came from the sea, and then 1 escaped behind a rock. How many are left? Answer □
Answer: 5fish
(2)On the mountain, there are 4 birds. 3 more flew in from the forest over there, and then 1 flew off toward the valley. How many are left? Answer □
Answer: 6birds
(3)In front of the store, there are 2 cars. 1 more came from the road, and then 2 went off to the other side. How many are left? Answer □
Answer: 1car
(4)On the mountain, there are 4 birds. 1 flew off toward the valley, and then 6 flew in from the forest over there. How many are there in all? Answer □
Answer: 9birds
(5)In the field, there are 6 chicks. 4 went back to their parents, and then 4 came from the chicken coop. How many are there in all? Answer □
Answer: 6chicks
(6)In the pond, there are 2 fish. 2 escaped behind a rock, and then 4 came from the sea. How many are there in all? Answer □
Answer: 4fish
What to do next
More worksheets in this unit
Add, Then SubtractAdd, Then Subtract Fill in the Blank
Add, Then SubtractAdd, Then Subtract Word Problems
Subtract Then Add: A-B+CSubtract Then Add: A-B+C Calculation
Subtract Then Add: A-B+CSubtract Then Add: A-B+C Fill in the Blank
Subtract Then Add: A-B+CSubtract Then Add: A-B+C Word Problems
Mixed Addition and Subtraction ReviewMixed Addition and Subtraction Review Calculation
Mixed Addition and Subtraction ReviewMixed Addition and Subtraction Review Fill in the Blank
