Suggested answers Number


ℕ0 0 –15


0,142857 √


__ 3


√ 1 √


_ 6


√ 3


3 √


__ 1


_ 4


___ 19


__ 11


√ √


– √ 3


____ 144


___ 0,9


___ 64


___ −1


___ −1


Remedial


Some learners may have difficulty in understanding the inclusiveness of the set of real numbers of all the other kinds of numbers dealt with in this unit. Use diagrams to help learners understand the interrelationships between the sets of numbers.


Unit 2 Calculations with numbers and integers Learner’s Book page 19


Unit focus


This unit focusses on the following: • Revision of calculation techniques for working with whole numbers such as • estimating your answer; • adding, subtracting and multiplying with columns; • long division; • rounding off and compensating; and • using a calculator.


Background information


Learners should already be familiar with all the following concepts. This should be revision, however it is important that you ensure learners can do: • mental calculations with whole numbers including multiplication up to 12 × 12; • calculations with whole numbers mentally as well as using a calculator; • identify prime numbers up to 100; and • list the properties of whole numbers.


Chapter 1: Numbers and integers 33


yes no no no


no no


no no no


no


yes no


no


yes yes no no


no no


no


yes no


no


yes yes


no


ℤ


yes yes yes no


yes yes


no


yes yes


no


yes yes


no


ℚ


no no no


yes no no


yes no no


yes no no


no


ℚ′


yes yes yes yes


yes yes


yes yes yes


yes yes yes


no


ℝ


CHAPTER 1


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