14.

Here is a formula

RT = R1+ R2

Here are the replacement numbers

R1 = 5, R2 = 7

Here we replaced the letters with numbers

RT = 5 + 7

Here we solved the formula (by adding)

RT = 12

NOW YOU DO IT:

Here is the formula

E - IR

Here are the replacement numbers

I = 2, R = 3

DO THIS

REPLACE THE LETTERS WITH NUMBERS

E = _____ x _____

DO THIS

SOLVE THE FORMULA (by multiplying)

E = _________

41.

If you try to add 3 apples and 4 oranges, you won't know what to call

the answer.

(orples?)

Can you add 3M and 4K? *

65.

The bottom part of a fraction is called the _____________________.