1. Name ______________________________ Date ____________________
Mrs. Labuski / Mrs. Portsmore Period _______ Unit 2 Lesson 1
Solving & Writing Add Equations
Essential question: How do you determine whether a
TB Lesson 2-4
number is a solution of an equation?
OC Lesson 4-2
VOCABULARY DEFINTION EXAMPLE
Operations that
10 + 9 = 19 is
undo each other:
19 – 9 = 10
addition and
Inverse operations
subtraction, or
7 × 9 = 63 is
multiplication and
63 ÷ 9 = 7
division
1. s + 3 = 23 s + 3 = 23 2. v + 10 = 49 v + 10 = 49 3. q + 9 = 16 q + 9 = 16
4. 81 + m = 90 81 + m = 90 5. s + 8 = 12 s +8 = 12 6. v + 11 = 17 v + 11 = 17
7. q + ⅛ = ⅞ q+⅛=⅞ 8. m + ¼ = ¾ m+¼=¾ 9. x +⅜ = ⅝ x+⅜=⅝

2. Solve each equation. Show the check!
1. m + 8 = 17 2. r + 14 = 20
3. 25 + x = 32 4. 47 +p = 55
5. 19 + d = 27 6. 13 + n = 26
Marilyn has a fish tank that contains 38 fish. There are 9 goldfish and
f other fish.
Juanita has 102 beads to make n necklaces. Each necklace will have 17
beads.
Craig is c years old. His 12-year-old sister Caitlin is 3 years younger
than Craig.
Sonia rented ice skates for h hours. The rental fee was $2 per hour and
she paid a total of $8.

3. Name ______________________________ Date ____________________
Mrs. Labuski / Mrs. Portsmore Period _______ Unit 2 Lesson 1
Solving & Writing Add Equations
Essential question: How do you determine whether a
TB Lesson 2-4
number is a solution of an equation?
OC Lesson 4-2
VOCABULARY DEFINTION EXAMPLE
Operations that
10 + 9 = 19 is
undo each other:
19 – 9 = 10
addition and
Inverse operations
subtraction, or
7 × 9 = 63 is
multiplication and
63 ÷ 9 = 7
division
1. s + 3 = 23 s + 3 = 23 2. v + 10 = 49 v + 10 = 49 3. q + 9 = 16 q + 9 = 16
-3 -3 20+3 = 23 -10 -10 39+10=49 -9 = -9 7 + 9 = 16
s =20 23 = 23 v =39 49=49 q=7
16 = 16
4. 81 + m = 90 81 + m = 90 5. s + 8 = 12 s +8 = 12 6. v + 11 = 17 v + 11 = 17
-81 -81 81 + 9 = 90
-8 -8 4 + 8 =12 -11 -11 6 +11 = 17
m = 9 s=4 v=6
90 = 90 12=12 17 = 17 
7. q + ⅛ = ⅞ q+⅛=⅞ 8. m + ¼ = ¾ m + ¼ = ¾ 9. x +⅜ = ⅝ x+⅜=⅝
-⅛ -⅛ 6
+⅛=⅞
-¼ -¼ + ¼ = ¾
2 -⅜ -⅜ 2+⅜=⅝
8
q=6 m=2 x =2
8 4
⅞ = ⅞ ¾ = ¾
8 4 8 ⅝ = ⅝

4. Solve each equation. Show the check!
1. m + 8 = 17 m + 8 = 17 2. r + 14 = 20 r + 14 = 20
-8 -8 9 + 8 = 17 - 14 -14 6 + 14 = 20
m =9 17 = 17  r=6 20 = 20
3. 25 + x = 32 25 + x = 32 4. 47 +p = 55 47 +p = 55
-25 -25 25 + 7 = 32 -47 -47 47 + 8 = 55
x=7 32 = 32 p=8 55 = 55
5. 19 + d = 27 19 + d = 27 6. 13 + n = 26 13 + n = 26
-19 -19 19 + 8 = 27 -13 -13 13 + 13 = 26
d=8 27 = 27  n = 13 26 = 26
Marilyn has a fish tank that contains 38 fish. There are 9 goldfish and f other
fish.
f + 9 = 38
Juanita has 102 beads to make n necklaces. Each necklace will have 17 beads.
17n = 102
Craig is c years old. His 12-year-old sister Caitlin is 3 years younger than Craig.
c − 3 = 12
Sonia rented ice skates for h hours. The rental fee was $2 per hour and she paid
a total of $8.
2h = 8