Page 54 - TB_6B
P. 54
Objective: Learn how to multiply and divide positive and negative integers.
Ricky is running from west to east at the speed of 3 m per second. Have
Ricky start from where he is now. Find Ricky’s positions at different times.
WestEast
0
6m 3m 3m 6m
Time Distance Ricky Can Time Ricky’s
Travel in1 Second (m) ( : later, : ago) Position
Future 3 3 3 1=3
Present (0) 2
1
Past 0
1
2
3
Chat
Use a and write an expression to find Ricky’s position. Let a the time.
21. Positive Signs and Negative Signs 43
Ricky is running from west to east at the speed of 3 m per second. Have
Ricky start from where he is now. Find Ricky’s positions at different times.
WestEast
0
6m 3m 3m 6m
Time Distance Ricky Can Time Ricky’s
Travel in1 Second (m) ( : later, : ago) Position
Future 3 3 3 1=3
Present (0) 2
1
Past 0
1
2
3
Chat
Use a and write an expression to find Ricky’s position. Let a the time.
21. Positive Signs and Negative Signs 43
