Use mental calculations -- compatible numbers, substitutions, equal products, or equal quotients -- to compute exact answers.
show all steps. indicate which method you are using.
1) 90 / 18
2) 15 x 104
3) 35 x 60
4) 5 x 18 x 4 x 10
5) 82 - 29

saving = more money

step-by-step explanation:

if you have 100 bucks, and you want to buy a candy bar, even if you have one at home, if you choose not to buy it, you save.

~courtney

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.

answer: it depends on what the tax percentage