complementary and supplementary angles

Front

What equation could this bar model represent?

Back

Front

What equation could this bar model represent?

Back

Front

Back

Front

What are variables in math?

Back

Letters

Front

A variable represents what is ______________.

Back

unknown

Front

In this expression what is the variable? 5 + y

Back

y

Front

15 + d = 27

Back

12

Front

18 + x = 21

Back

x = 3

Front

19 - R = 14

Back

R = 5

Front

7 + n = 11

Back

n = 4