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Mathematics

Multiplication

Educator section

Memorandum

1.1 7 700
32
236
986
× 10 2
3 200
98 600
4614 461 400
1.2 6 6 000
27
53
719
× 10 3
27 000
53 000
719 000
894 894 000
1.3 4
19
236
10 3
400 000
1 900 000
23 600 000

2. 2.1 20 000 + 9 000 = 29 000

2.2 160 000 + 1 200 = 158 800

2.3 700 000 = 4 000 000 = 4 700 000

2.4 8 000 000 + 160 000 = 7 840 000

Leaner section

Content

Activity: to determine output values for given input values [lo 2.3.2]

1. Let us see whether you are able to apply your knowledge of powers of 10 correctly. Complete the following flow diagrams:

1.1

1.2

1.3

2. Work together with a friend and calculate:

2.1 (2 x 10 4 ) + (9 x 10 3 ) = ____________ + ____________ = ____________

2.2 (16 x 10 4 ) + (12 x 10 2 ) = ___________ + ____________ = ____________

2.3 (7 x 10 5 ) + (4 x 10 6 ) = ____________ + ____________ = ____________

2.4 (8 x 10 6 ) + (16 x 10 4 ) = ____________ + ____________ = ____________

3. Check your answers with a calculator.

CAN YOU STILL REMEMBER?

Explain to a friend how you can programme a calculator to multiply in powers of 10.

Assessment

Learning Outcome 2: 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 2.3: We know this when the learner determines output values for given input values, or input values for given output values, using:

2.3.2: flow diagrams.

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Source:  OpenStax, Mathematics grade 6. OpenStax CNX. Sep 10, 2009 Download for free at http://cnx.org/content/col11030/1.1
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