Addition Equations Worksheet
Algebra Foundations Level 1: Addition
One-Step Equation Expedition
Name:
Date: Period:
!
Directions: Solve each one-step addition equation by isolating the variable using subtraction. Show your inverse operation in each workspace!
Page 1 of 3 (Q 1–10)
#1 \( x + 6 = 15 \) Show Work ↓
Answer:
x =
#2 \( y + 9 = 22 \) Show Work ↓
Answer:
y =
#3 \( m + 14 = 31 \) Show Work ↓
Answer:
m =
#4 \( a + 8 = 20 \) Show Work ↓
Answer:
a =
#5 \( k + 17 = 40 \) Show Work ↓
Answer:
k =
#6 \( n + 25 = 50 \) Show Work ↓
Answer:
n =
#7 \( p + 11 = 29 \) Show Work ↓
Answer:
p =
#8 \( w + 19 = 35 \) Show Work ↓
Answer:
w =
#9 \( b + 7 = 33 \) Show Work ↓
Answer:
b =
#10 \( c + 15 = 42 \) Show Work ↓
Answer:
c =
Rule: To isolate the variable in \( x + a = b \), subtract \( a \) from both sides. Page 1
Part 2
One-Step Addition Equations
Name:
Page 2 of 3 (Q 11–20)
Inverse Operation Check: If \( x + 18 = 45 \), subtract 18 from both sides: \( x = 45 - 18 \). Keep sides balanced!
#11 \( d + 18 = 45 \) Show Work ↓
Answer:
d =
#12 \( r + 24 = 61 \) Show Work ↓
Answer:
r =
#13 \( h + 13 = 38 \) Show Work ↓
Answer:
h =
#14 \( t + 36 = 72 \) Show Work ↓
Answer:
t =
#15 \( g + 29 = 54 \) Show Work ↓
Answer:
g =
#16 \( z + 16 = 43 \) Show Work ↓
Answer:
z =
#17 \( v + 28 = 65 \) Show Work ↓
Answer:
v =
#18 \( s + 42 = 89 \) Show Work ↓
Answer:
s =
#19 \( f + 23 = 51 \) Show Work ↓
Answer:
f =
#20 \( j + 35 = 90 \) Show Work ↓
Answer:
j =
Self-Check Strategy: Plug your answer back into the original equation to verify your sum! Page 2
Part 3
One-Step Addition Equations
Name:
Page 3 of 3 (Q 21–30)
Final Stretch: Complete the final 10 equations and check your work carefully. Goal: 30 / 30
#21 \( q + 47 = 83 \) Show Work ↓
Answer:
q =
#22 \( u + 56 = 100 \) Show Work ↓
Answer:
u =
#23 \( x + 38 = 91 \) Show Work ↓
Answer:
x =
#24 \( y + 64 = 112 \) Show Work ↓
Answer:
y =
#25 \( m + 27 = 75 \) Show Work ↓
Answer:
m =
#26 \( k + 53 = 120 \) Show Work ↓
Answer:
k =
#27 \( n + 49 = 105 \) Show Work ↓
Answer:
n =
#28 \( p + 75 = 143 \) Show Work ↓
Answer:
p =
#29 \( w + 68 = 134 \) Show Work ↓
Answer:
w =
#30 \( a + 84 = 160 \) Show Work ↓
Answer:
a =
Total Score: / 30
Great job! You have completed all 30 one-step addition equations.
Page 3
