User Manual

Point out that the Money column looks like the

multiplication table for the number 4. This connects

them back to something familiar. Remind the

students that they know that Kyle earns $4 per

week. This is the rate of Kyle's savings and it can be

written in fractional form as

Ask the students to fill in more of the table

describing how much Kyle will save. Have them fill

in the table for weeks 6 and 7, and then ask if they

can determine the amount of money for 10 weeks, 25

weeks, and 100 weeks. Finally, ask them if they could

fill in the amount of money after some number of

weeks. Call the unknown number of weeks a variable

and use the letter W to represent weeks. Use the

variable M to represent money.

All of this investigation should be done

without

the

calculator for these basic multiplication facts. If

students need support with their multiplication,

encourage looking up facts in a chart rather than

using the calculator, to promote mental math and

appropriate calculator use.

Ask students to write the expression for the

calculation using W,

, and 4.*

(Answer: W x 4)

Week (W) Money (M)

11x4=4

22x4=8

33x4=12

44x4=16

55x4=20

66x4=24

77x4=28

10 10x4=40

25 25x4=100

WWx4*

At the movies (Continued)

rate =

1 week