AF 1.1 Write equations using variables

DefinitionsVariable – A variable is a letter or symbol that represents a number (unknown quantity).

8 + n = 128 + = 12

DefinitionsA variable can use any letter of the alphabet.

n + 5x – 7w - 25

Words That Lead to Addition

SumMore thanIncreasedPlusAltogether

Words That Lead to Subtraction

DecreasedLessDifferenceMinusHow many more

Write Algebraic Expressionsfor These Word Phrases

Ten more than a numberA number decrease by 56 less than a numberA number increased by 8The sum of a number &

94 more than a number

n + 10

w - 5x - 6n + 8n + 9

y + 4

Write Algebraic Expressionsfor These Word Phrases

A number plus 2A number decrease by 131 less than a numberA number increased by 7The sum of a number & 69 more than a number

s + 2k - 1

x - 31b + 7n + 6

z + 9