OLE! Build Our Own TOSTADAS! Tortilla, beans & cheese only, please! Adapted from GEMS Math on the Menu & present by: CATHY JONES Math Specialist Center for Mathematics and Science Education Arkansas NASA Education Resource Center 346 N. West Avenue, Room 202 Fayetteville, Arkansas 72701 Office: (479) 575-3875 Cell: (479) 209-0070 E-mail: cejkej@yahoo.com Web: Cmasemath.pbworks.com Standards: CCSS 5.NBT.7, 5.NBT.3b Supplies: (See pages 4-9 for management ideas) Hand out pages Scissors Glue stick Large paper for posters Pictures or die cut items (optional) Pencil Calculator (optional)

OLE! Build Our Own TOSTADAS! Tortilla Cheese Tortilla, beans & cheese only, please! Beans Other toppings available. What would you choose? Salsa Lettuce Olives

Olives: 75 cents Tortilla: 50 cents Salsa: 65 cents Beans: 65 cents A nearby restaurant advertises BUILD YOUR OWN TOSTADAS! You and your friends decided to order. Two of you took their orders and they each gave you some money. You wrote down everyone’s order very carefully, everyone had three items on their tostada, but no one’s order was alike. You gave the cashier the list of orders , paid for each one separately and wanted to make sure everyone was charged correctly. You realized that they had charged the same amount for some of the orders. You no longer had your list of orders so you had to “re-create” the list. They had the options and prices posted on the wall. Use the chart below and see if it is possible to have different Tostadas, but still pay the same price as someone else? Olives: 75 cents Tortilla: 50 cents .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 $2.75 $2.85 $2.95 $2.35 $2.55 $2.45 $2.75 $2.95 $2.45 $2.85 Salsa: 65 cents Beans: 65 cents Cheese: $1.05 Lettuce: 55 cents

If students are doing this activity and have pictures or cutouts to make the Tostadas on a poster, then PRINT the next slide only! It can be cut apart horizontally and will be for 2 posters. The small cards can just be moved around when they are looking at the possible combinations. They do not need to be placed on the poster. When the students make their poster, have them write the price of the tostada under the picture. Use the >, < or = symbol to compare to the price next to it.

Tortilla: 50 cents Olives: 75 cents Beans: 65 cents Salsa: 65 cents $2.75 $2.85 $2.95 $2.35 $2.55 $2.45 .50 Standards: CCSS 5.NBT.7, 5.NBT.3b Name(s): ___________________________________ Tortilla: 50 cents Olives: 75 cents Beans: 65 cents Salsa: 65 cents Cheese: $1.05 Lettuce: 55 cents $2.75 $2.85 $2.95 $2.35 $2.55 $2.45 .50 Standards: CCSS 5.NBT.7, 5.NBT.3b Name(s): ___________________________________ Tortilla: 50 cents Olives: 75 cents Beans: 65 cents Salsa: 65 cents Cheese: $1.05 Lettuce: 55 cents

If students are doing this activity and DO NOT have pictures or cutouts to make the Tostadas on a poster, then PRINT the next slide only! The small cards can be cut apart and grouped for each of the TOSTADA combinations. You will need one page for each poster. Fill in the chart and place them all on a poster.

Beans: 65 cents Lettuce: 55 cents Beans: 65 cents Lettuce: 55 cents $2.75 $2.85 $2.95 $2.35 $2.55 $2.45 .50 Standards: CCSS 5.NBT.7, 5.NBT.3b Name(s): ___________________________________ Beans: 65 cents Lettuce: 55 cents Beans: 65 cents Lettuce: 55 cents Beans: 65 cents Lettuce: 55 cents Tortilla: 50 cents Olives: 75 cents Tortilla: 50 cents Olives: 75 cents Tortilla: 50 cents Olives: 75 cents 65 cents Salsa: Cheese: $1.05 65 cents Salsa: Cheese: $1.05 65 cents Salsa: Cheese: $1.05 Beans: 65 cents Lettuce: 55 cents Beans: 65 cents Lettuce: 55 cents Beans: 65 cents Lettuce: 55 cents Tortilla: 50 cents Olives: 75 cents Tortilla: 50 cents Olives: 75 cents Tortilla: 50 cents Olives: 75 cents 65 cents Salsa: Cheese: $1.05 65 cents Salsa: Cheese: $1.05 65 cents Salsa: Cheese: $1.05 Tortilla: 50 cents Tortilla: 50 cents Tortilla: 50 cents Tortilla: 50 cents

If students are just doing this as a worksheet, print the next slide only.

Name: _________________________________ Standards: CCSS 5.NBT.7, 5.NBT.3b .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 $2.75 $2.85 $2.95 $2.35 $2.55 $2.45 $2.75 $2.95 $2.45 $2.85