Question

Miriam needs to buy new notebooks for school. The notebooks cost $0.98 each including tax. Miriam's mother gave her $6.45 and told her to buy 8 notebooks. Did her mother give her enough money?

Answer 1

Yes his mom did give her enough money

Answer 2

You have to pick the amount of money she has and divide by the price of each notebook to see how many she can buy. So 6.45/0.98 = 6.6 so she could buy only 6 notebooks. 

0.98 is near 1 so you can imagine by seeing the price of each that will be almost $1 per notebook so with $6.45 isn't enough.