1. Solving Equations
Grade 5 Math

2. A mathematical sentence stating that 2 expressions are equal.
Definitions
Equation
A mathematical sentence stating that 2 expressions are equal.
12 – 3 = 9
8 + 4 = 12

3. Means that the amount is the same on both sides.
Definitions
Equals Sign (=)
Means that the amount is the same on both sides.
4 + 2 = 6
5 – 2 = 3

4. An equation is like a balance scale
An equation is like a balance scale. everything must be equal on both sides. = 10
5 + 5

5. When the amounts are equal on both sides it is an equation.12 =
6 + 6

6. When the amounts are unequal on both sides it is an inequality.≠ 8
2 + 2

7. Unknowns

8. Are these expressions or equations?
m + 4 = 17
N + 4
12 – 3 = p
3 + v = 13
y – 6
equation
expression
equation
equation
expression

9. ~ the opposite operation used to undo the first.
How to Solve Equations
Inverse operation
~ the opposite operation used to undo the first.
4 + 3 = 7 7 – 3 = 4
6 x 6 = / 6 = 6

10. How to solve an addition equation
Use the inverse operation for addition which is subtraction
m + 8 = 12
- 8 = -8
m = 4

11. How to solve a subtraction equation
Use the inverse operation for subtraction which is addition
m - 3 = 5
+3 =+3
m = 8

12. Solve these equations using the inverse operations3
n + 4 = 7
n – 5 = 4
n + 4 = 17
n – 6 = 13
n + 7 = 15
n – 8 = 17 9 13 19 8 25