1E Negative integers Learning intentions
Inter-year links
✔ I can compare the value of positive and negative numbers.
Years 5/6
Negative numbers
Year 7
5A Negative numbers
SA LE
✔ I can use negative numbers to represent real-life situations.
Integers
R
•
The set of integers includes positive whole numbers, negative whole numbers and zero. Negative integers are less than zero in value and are always preceded by a negative sign, −, placed directly before the first digit. Positive integers are greater than zero in value and can be represented using a positive sign, +. The positive sign can also be left out. increasing value
FO
• •
decreasing value
3
4
5
6
7
8
-N
°C 110 100 90
Ordering numbers
80
•
70
O
Numbers are in ascending order when they are arranged in order of increasing value. Numbers are in descending order when they are arranged in order of decreasing value. 3
R AF
T
•
2
D
ascending
• • •
60 50 40 30
1 0
–1
9 10
positive integers
In the real world, negative numbers are used to represent quantities that lie on a scale that goes below zero. A sign is used to indicate direction relative to the reference point of zero. For example, a negative temperature indicates that the temperature has dropped below the reference point of 0°.
N LY
•
zero integers
2
O
negative integers
1
T
–10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0
20 descending
–2
‘Less than’ is shown using the symbol ‘<’ ‘Greater than’ is shown using the symbol ‘>’ ‘Equal to’ is shown using the symbol ‘=’
10 0
reference point
–10 –20
CHAPTER 1 Integers — 27 No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means.
OXFORD UNIVERSITY PRESS
BOOK_OM_VIC_Y8_SB_29235_TXT_PPS_NG.indb 27
21-Oct-21 18:11:26
