L31 · Two-way tables

1. 1.

   A table shows how 6th graders get to school: walk 13, bike 7, bus 17. How many students were surveyed?

   Walk	Bike	Bus
   13	7	17

   Answer. 37

   13 + 7 + 17 = 37.

2. 2.

   A table shows how 6th graders get to school: walk 12, bike 11, bus 19. How many students were surveyed?

   Walk	Bike	Bus
   12	11	19

   Answer. 42

   12 + 11 + 19 = 42.

3. 3.

   A table shows how 6th graders get to school: walk 14, bike 11, bus 12. How many students were surveyed?

   Walk	Bike	Bus
   14	11	12

   Answer. 37

   14 + 11 + 12 = 37.

4. 4.

   A table shows how 6th graders get to school: walk 14, bike 8, bus 11. How many students were surveyed?

   Walk	Bike	Bus
   14	8	11

   Answer. 33

   14 + 8 + 11 = 33.

5. 5.

   A table shows how 6th graders get to school: walk 14, bike 12, bus 15. How many students were surveyed? Then Elena needs 4 of that amount. What is the total they need?

   Walk	Bike	Bus
   14	12	15

   Answer. 164

   14 + 12 + 15 = 41. Then multiply by 4: 164.

6. 6.

   A table shows how 6th graders get to school: walk 10, bike 9, bus 15. How many students were surveyed? Then Luis needs 3 of that amount. What is the total they need?

   Walk	Bike	Bus
   10	9	15

   Answer. 102

   10 + 9 + 15 = 34. Then multiply by 3: 102.

7. 7.

   A table shows how 6th graders get to school: walk 8, bike 13, bus 20. How many students were surveyed? Then Elena needs 2 of that amount. What is the total they need?

   Walk	Bike	Bus
   8	13	20

   Answer. 82

   8 + 13 + 20 = 41. Then multiply by 2: 82.

8. 8.

   A table shows how 6th graders get to school: walk 10, bike 9, bus 18. How many students were surveyed? Then Theo needs 4 of that amount. What is the total they need?

   Walk	Bike	Bus
   10	9	18

   Answer. 148

   10 + 9 + 18 = 37. Then multiply by 4: 148.

9. 9.

   A table shows how 6th graders get to school: walk 16, bike 9, bus 12. How many students were surveyed? Then Mei needs 2 of that amount. What is the total they need?

   Walk	Bike	Bus
   16	9	12

   Answer. 74

   16 + 9 + 12 = 37. Then multiply by 2: 74.

10. 10.

    A table shows how 6th graders get to school: walk 8, bike 8, bus 10. How many students were surveyed? Then Mei needs 3 of that amount. What is the total they need?

    Walk	Bike	Bus
    8	8	10

    Answer. 78

    8 + 8 + 10 = 26. Then multiply by 3: 78.

11. 11.

    Think

    Theo tried this problem:
    A table shows how 6th graders get to school: walk 16, bike 6, bus 11. How many students were surveyed?
    Theo wrote 32. That is not correct. What is the right answer?

    Walk	Bike	Bus
    16	6	11

    Answer. 33

    Theo’s answer 32 is off. 16 + 6 + 11 = 33.

12. 12.

    Think

    Luis tried this problem:
    A table shows how 6th graders get to school: walk 9, bike 12, bus 17. How many students were surveyed?
    Luis wrote 39. That is not correct. What is the right answer?

    Walk	Bike	Bus
    9	12	17

    Answer. 38

    Luis’s answer 39 is off. 9 + 12 + 17 = 38.

Original extra practice. Keys are computed from the items, not guessed.