Doug family buys 7 postcards while on vacation. each postcard cost $0.25 including tax. how can doug use what he knows whole number multiplication to check his answer

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Angela is buying a dress that is on sale for 20% off. if the original price of the dress is $40.00, how much money is angela saving on the dress? a. $0.80 b. $3.20 c. $32.00 d. $8.00

If i have 20$ and i gave 5$ away how much i got