WorksheetsUnknown Numbers
Total questions: 8
Worksheet time: 6mins
Name
Class
Date
1.
What is the missing number?
6 + ____ = 15
15 - ____= 6
a)
8
b)
21
c)
9
d)
10
2.
What is the missing number?
8 + ___= 16
16 - 8 =_____
a)
7
b)
10
c)
9
d)
8
3.
What is the missing number?
4 + ______ = 12
12 - 4 =_____
a)
8
b)
16
c)
4
d)
10
4.
Find the missing number
5+__= 8
8 - 5 =___
a)
3
b)
6
c)
5
d)
8
5.
What is the unknown number?
17-8=?
8+?=17
(a)
6.
What is the unknown number?
11-3=?
3+?=11
(a)
7.
What is the related addition fact for
15-9=6
a)
9+6=15
b)
10+5=15
c)
15-6=9
d)
8+7=15
8.
What is the unknown number?
17-8=?
8+?=17
(a)
100 %
