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  • GETIntPhaseMaths display tagshide tags

    This module is included inLens: Siyavula: Mathematics (Gr. 4-6)
    By: Siyavula

    Review Status: In Review

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To calculate with the help of selected operations appropriate to solving the problem

Module by: Siyavula Uploaders. E-mail the author

MATHEMATICS

Multiplication

EDUCATOR SECTION

Memorandum

LEANER SECTION

Content

Activity: To calculate with the help of selected operations appropriate to solving the problem [LO 1.8.4]

1. Now use any method and calculate:

  • 654 x 78

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1.2 426 x 387

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1.3 729 x 345

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TIME FOR SELF-ASSESSMENT

It is important for us to know how you feel about the section of the work that we have completed. Give an indication of how well you understand it by reading the criteria and marking the appropriate blocks with a tick.

Table 1
  GO WAIT STOP
I understand the powers of 10 and can do calculations with them. (LO 1.10) _______ _______ _______
I can programme my calculator to multiply in powers of 10. (LO 1.10) _______ _______ _______
I can use an alternative method instead of multiplying by 25 (LO 1.10) _______ _______ _______
I can multiply by 125 without using 125 as the multiplier. (LO 1.10) _______ _______ _______
I know my tables. (LO 1.9) _______ _______ _______
I understand all the methods of multiplication shown in this module. (LO 1.11 and LO 2.6) _______ _______ _______
I can calculate the product of any 2 numbers without using my calculator. (LO 1.8) _______ _______ _______

BRAIN-TEASER!

In Scotland, in 1617, Lord John Napier used the following table for multiplication:

He calculated 456 x 8 in this manner:

His answer was 3 648.

1. Work with a friend. Can the two of you work out his method?

2. Use the table and calculate:

2.1 698 x 5

= .........................

2.2 687 x 9

= .........................

2.3 How would you calculate 6 437 × 382 by using the table??

= .........................

2.4 Give your friend a sum to do by using the table. Write the sum, calculation and the answer below.

2.5 Check your friend’s sum.

Assessment

Learning Outcome 1: The learner will be able to recognise, describe and represent numbers and their relationships, and to count, estimate, calculate and check with competence and confidence in solving problems.

Assessment Standard 1.11: We know this when the learner uses a range of strategies to check solutions and judge the reasonableness of solutions.

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 2.6: We know this when the learner determines, through discussion and comparison, the equivalence of different descriptions of the same relationship or rule presented:

2.6.3: by number sentences.

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Definition of a lens

Lenses

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