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• GETIntPhaseMaths

This module and collection are included inLens: Siyavula: Mathematics (Gr. 4-6)
By: Siyavula

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# To use a series of techniques to perform calculations

Module by: Siyavula Uploaders. E-mail the author

## Memorandum

1.1 50 000 + 400 + 30 + 6

1.2 90 000 + 800 + 10 + 7

### PUZZLE!

100 000

100 000; hundred thousand

## Leaner Section

### ACTIVITY: To use a series of techniques to perform calculations [1.10.3]

1. Do you still remember what "expanded notation" is? Quickly explain it to a partner! Then look at the example and see whether you can write the following numbers in expanded notation:

e.g. 36 518 = 30 000 + 6 000 + 500 + 10 + 8

1.1 50 436 =

1.2 98 017 =

### PUZZLE!

What number is 10 times larger than 10 000?

9 + 1 = 10 ten

99 + 1 = 100 one hundred

999 + 1 = 1 000 one thousand

9 999 + 1 = 10 000 ten thousand

99 999 + 1 = __________________ __________________

• Let us see if you were correct!
 Hundred thousand Ten thousand Thousand Hundred Ten One HTh TTh Th H T U 10 × 10 × 10 × 10 × 10 10 × 10 × 10 × 10 10 × 10 × 10 10 × 10 10 1 3 1 8 5 2 6

We read 318 526 as three hundred and eighteen thousand five hundred and twenty six.

You were therefore correct if you said 100 000 (hundred thousand).

## Assessment

Learning Outcome 1: The learner will be able to recognise, describe and represent patterns and relationships, as well as to solve problems using algebraic language and skills.

Assessment Standard 1.10: We know this when the learner uses a range of techniques to perform written and mental calculations with whole numbers including:

1.10.3: building up and breaking down numbers

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##### What is in a lens?

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