Activities

1. Multiply 7 x 80
   
   
2. Estimate the product of 5 x 73

3. The third grade class is going on a field trip to see a play and needs to purchase tickets.  If there are four classes with twenty students each, how many tickets do they need to purchase just for the students? Show your work.
   
   
4. Sophia bought 9 packages of juice boxes.  Each package has 12 juice boxes.  Sophia estimated she had about 90 juice boxes.  Do you agree or disagree?  Explain.

5. Mrs. Panda wanted to purchase notebooks for the entire 3^rd grade.  There are four third grade classes that have about 30 students each.  How many notebooks should she buy so that each student will receive two?  Show your work.
   
   
6. The third and fourth grade classes are joining together to collect cans for the local food pantry.  There are four third grade classes and five fourth grade classes.  Each of the third grade classes collected about 70 cans.  Each of the fourth grade classes collected about 80 cans.  About how many total cans will the classes be donating to the food pantry?  Show your work.

Answer Key/Rubric

1. 560
   
   
2. 350 (Round 73 to 70)

3. 4 x 20 = 80
   
   
4. Acceptable responses may include, but are not limited to:

• Agree
• Round 12 to 10 then multiply by 9 to get 90.

5. 240 notebooks
   Acceptable work may include, but is not limited to:

• Calculate the approximate number of students
       4 x 30 = 120
• Double this so they each get two
       120 + 120 = 240

6. About 680 cans
   Acceptable work may include, but is not limited to:

• Calculate the third grade can total:
       4 x 70 = 280
• Calculate the fourth grade can total:
       5 x 80 = 400
• Combine the third and fourth grade cans:
       280 + 400 = 680