Math Drills
Mixed Addition and Subtraction Review
B-3Fill in the Blank
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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 · Fill in the Blank12 questions
- Subtract Then Add: A-B+C · Fill in the Blank12 questions
Questions & answers
Problems and answers on this worksheet
These are the problems in “Mixed Addition and Subtraction”, shown with their answers.
(1)□+8-4=8
Answer: 4
(2)7+6-□=9
Answer: 4
(3)□+5-5=3
Answer: 3
(4)9+9-□=10
Answer: 8
(5)8+□-8=9
Answer: 9
(6)8+□-6=3
Answer: 1
(7)1+□-5=5
Answer: 9
(8)8+□-4=11
Answer: 7
(9)4+2-□=2
Answer: 4
(10)4+□-5=4
Answer: 5
(11)□+7-5=6
Answer: 4
(12)6+□-5=10
Answer: 9
(13)9-2+□=10
Answer: 3
(14)□-1+4=12
Answer: 9
(15)4-4+□=2
Answer: 2
(16)7-□+8=14
Answer: 1
(17)8-6+□=7
Answer: 5
(18)9-□+8=10
Answer: 7
(19)7-2+□=9
Answer: 4
(20)□-3+1=5
Answer: 7
(21)8-6+□=5
Answer: 3
(22)8-5+□=4
Answer: 1
(23)7-□+9=12
Answer: 4
(24)□-4+4=6
Answer: 6
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 Word Problems
