1.17 Fun with the pocket calculator

Mathematics

Having fun with pocket calculators and negative numbers

Educator section

Memorandum

17. a) 5

b) -19

c) -10

d) 9

Leaner section

Content

Activity: fun with the pocket calculator [lo 1.10]

17. Are the following true or false ? If false, calculate the correct answer:

a) 4 + (-3) + 2 + 9 + (-2) + (-5)

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b) 4 + (-3) + (-1) + (-7) + (-4)

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c) 1 + (-5) + 2 + (-4) + (-3) + (-1)

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d) -9 + (-2) + 11 + 13 + (-4)

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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 1.10: We know this when the learner uses a range of strategies to check solutions and judges the reasonableness of solutions.