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Having Fun with Pocket Calculators and Negative Numbers

Module by: Siyavula Uploaders. E-mail the author

MATHEMATICS

Having Fun with Pocket Calculators and Negative Numbers

EDUCATOR SECTION

Memorandum

23. a) -7 m

  1. a) -20 m
  2. b) -16 m
  3. c) -15 m

25. 22nd floor

Leaner Section

Content

ACTIVITY: Having Fun with Pocket Calculators and Negative Numbers

23. Some friends decided to go bungee jumping. Calculate how far below the bridge each one turned.

a) __________________________________________________________________

Figure 1
Figure 1 (Brug_01.jpg)

b) __________________________________________________________________

Figure 2
Figure 2 (Brug_02.jpg)

c) __________________________________________________________________

Figure 3
Figure 3 (Brug_03.jpg)

d) __________________________________________________________________

Figure 4
Figure 4 (Brug_04.jpg)

24. LET’S PLAY A GAME!!

Work with a friend. Remove the Jack, Queen, King, Ace and Joker from a deck of playing cards. Place the rest of the cards face down between the two of you. Take number 10 as a starting point.

Player 1: Pick up a card. If it is a black card, add the total / the number on the card to 10, but subtract the number if the card is red.

Player 2: Pick up a card. Do the same as player 1.

The players must check each other’s answers. Use a pocket calculator if you are unsure. Continue playing until the totals / numbers on all the cards have been added or subtracted.

25. BRAIN TEASER!

You are in a lift on the 4th floor of a building with basement floors. You come down 6 floors, then go up 13 floors and then come down 11 floors. Then you come down 9 floors and go up 23. You come down 17 floors again and go up 25. At which floor will you get out? ________________ . Show this in a sketch or on a number line.

26. CHALLENGE!

Draw a time line on which you indicate important events that occurred before as well as after your birth. Indicate your birth year as 0.

27. SELF-ASSESSMENT

Tick in the appropriate block:

Table 1
I can GOOD BETTER BEST
provide examples of negative numbers from everyday life. __________ __________ __________
key in negative numbers correctly into my pocket calculator. __________ __________ __________
arrange negative numbers from smallest to largest and vice versa. __________ __________ __________
add and subtract negative numbers with the help of my pocket calculator. __________ __________ __________
complete flow diagrams with negative numbers correctly. __________ __________ __________
do calculations involving negative numbers without a pocket calculator. __________ __________ __________

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A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

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