Addition & subtraction

Missing numbers

Name: ______________________________Date: ______________Score: ______ / 20

1.
In the number sentence 30 - □ = 27, what does the symbol □ stand for?
1. Aa missing number
2. Bthe answer 27
3. Ca plus sign
2.
Write the missing number: 650 + □ = 1000
3.
Write the missing number: □ + 6 = 30
4.
Write the missing number: 12 + □ = 45
5.
Copy and complete: 5 + □ = 100
6.
Copy and complete: □ - 14 = 8
7.
Copy and complete: 30 - □ = 16
8.
Write the missing number: 1 + 10 + □ = 100
9.
Write the missing number: 57 + □ = 120
10.
Write the missing number: 50 - □ = 31 + 10
11.
Write the missing number: 100 - □ = 58
12.
Write the missing number: 2 + 20 + □ = 100
13.
Bashir thinks of a number. He says, 'If I add 26 to my number, the answer is 95.' □ + 26 = 95. What is his number?
14.
Bashir thinks of a number. He says, 'If I subtract 16 from my number, the answer is 95.' □ - 16 = 95. What is his number?
15.
Write the missing number: 35 - □ = 19
16.
Find the missing operation sign: 28 □ 72 = 100
1. A-
2. B+
3. C=
17.
Find the missing operation sign: 55 = 70 □ 15
1. A+
2. B-
3. C×
18.
Find the missing operation sign: 40 □ 10 = 50
1. A+
2. B-
3. C=
19.
Find the missing operation sign: 90 □ 42 = 48
1. A-
2. B+
3. C=
20.
To find the missing number in 650 + □ = 1000, which subtraction can you use?
1. A1000 - 650
2. B1000 + 650
3. C650 - 1000

Answer key

Addition & subtraction — Missing numbers