Addition and subtraction of whole numbers

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: 12 + □ = 45
3.
Copy and complete: □ - 14 = 8
4.
Write the missing number: 57 + □ = 120
5.
Write the missing number: 100 - □ = 58
6.
Bashir thinks of a number. He says, 'If I subtract 16 from my number, the answer is 95.' □ - 16 = 95. What is his number?
7.
Find the missing operation sign: 28 □ 72 = 100
1. A-
2. B+
3. C=
8.
Find the missing operation sign: 90 □ 42 = 48
1. A-
2. B+
3. C=
9.
Which known fact helps you find the missing number in □ + 6 = 30?
1. A6 + 30 = 36
2. B24 + 6 = 30
3. C30 + 6 = 36
10.
The missing number in 15 + □ = 20 is 35.
True False
11.
You can use a number line to count on and find a missing number.
True False
12.
Work out each missing number, then order the calculations by their missing number from smallest to largest.
Write the order (smallest missing number to largest) in the boxes:
- ?8 + □ = 15
- ?8 + □ = 10
- ?8 + □ = 12
13.
Find the missing operation sign: 60 □ 25 = 35
1. A+
2. B=
3. C-
14.
What number comes just after 688?
15.
What number comes just after 541?
16.
Write this as a single number: 700 + 10 + 5
17.
Write this as a single number: 300 + 20 + 8
18.
Write this as a single number: 100 + 30 + 0
19.
Write this as a single number: 500 + 90 + 3
20.
What comes next? 827, 832, 837, 842, …

Answer key

Addition and subtraction of whole numbers — Missing numbers