If one store sells 12 pens for $9.00 and another sells 10 pens for $7.80, which is the better deal? If you have to buy 120 pens, how much will you save by using the less expensive supplier?
for the first one it would be 12 for 9.00 for your 120 pen question you would times until it gets to 120 which is 12 times 10 = 120 then you would do 10 times 9 = 90.00$ then you do the same for 10 for 7.80 10 times 12= 120 then you do 12 times 7.80 = 93.60 so you would save 3.60$ more on 12 for 9.00$ than 10 for 7.80$
