Solving Equations Grade 5 Math

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

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

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

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

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

Unknowns

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

~ 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 = 36 36 / 6 = 6

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

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

Solve these equations using the inverse operations 3 n + 4 = 7 n – 5 = 4 n + 4 = 17 n – 6 = 13 n + 7 = 15 n – 8 = 17 9 13 19 8 25