Number facts

what is the missing number in the following number sentence.

13 + ------- = 18

• 4

• 6

• 5

• 15

Which one of the following number sentences belongs to the fact family of 8,9 and 17.

• 8 + 9 = 17

• 9 - 8 = 1

• 17 - 9 = 8

• 17 - 8 = 9

which one of the following is NOT a fact of 10?

• 5 + 5

• 8 + 3

• 4 + 6

• 7 + 3

Which one of the following number sentences belong to fact family of 34 - 5 = 29

• 29 + 5 = 34

• 34 - 29 = 5

• 34 + 29 = 63

• 5 + 29 = 34

Which one of the followings are facts of 20.

• 13 + 7

• 19 + 1

• 15 + 6

• 10 + 10

What is the missing number in the following fact family.

a. ------- + 2 = 20

b. 20 - 2 = --------

c. 20 - ------- = 2

d. 2 + ------- = 18

• 8

• 17

• 18

• 4

Find a matching number sentence for:

12 + 10 = 22

• 22 + 10 = 32

• 12 - 10 = 2

• 22 - 10 = 12

• 22 + 12 = 34

What is the answer of 50 + 40?

• 9

• 19

• 80

• 90

Which one of the following multiples of 10 add up to give 80?

• 40 + 40

• 30 + 60

• 10 + 70

• 50 + 30

Which one of the following number sentences give the answer 50?

• 30 + 20

• 80 - 30

• 40 + 10

• 60 + 10