Using substitution to solve equations

Find the missing number. (Substitution)

5 + _ = 11

• 3

• 6

• 5

• 4

What number should replace the question mark? (Substitution)

8 + ? = 15

• 5

• 6

• 7

• 8

Determine the missing number. (Substitution)

12 - _ = 7

• 4

• 7

• 5

• 6

Find the number that completes the equation. (Substitution)

9 + _ = 14

• 4

• 5

• 6

• 3

Which number completes the equation? (Substitution)

? - 11 = 33

• 22

• 17

• 40

• 44

Which number makes the equation true? (Substiution)

9 - ? = 0

• 18

• -9

• 21

• 9

if 5 + a = 10

Then a must be equal to which number?

a = ?

• 5

• 6

• 10

• 15

if b + 7 = 13

Then b must be equal to which number?

b = ?

• -6

• 16

• 6

• 23

if v = 7

then which number makes this equation true?

v + 10 = ?

• 17

• 3

• 27

• 170

if m = 8

then which number makes this equation true? (substitution)

3 + m = ?

• 11

• 5

• 14

• -5