1.5 To calculate by selecting and using operations appropriate to

Mathematics

Number concept

Educator section

Memorandum

1.1 1 065

1.2 2 466

1.3 28 745

1.4 50 271

1.5 373 097

1.6 462 563

Puzzle!

12 54 24

42 30 18

36 6 48

Leaner section

Content

Activity: to calculate by selecting and using operations appropriate to solving problems [lo 1.8.2]

To use a series of techniques to perform calculations [lo 1.10.1]

1. Read the following questions attentively. Then decide which operations you need to use to find the answers. Use your pocket calculator and write down the number that is:

1.1 598 more than 467

1.2 2 346 less than 4 812

1.3 5 098 more than 23 647

1.4 46 138 less than 96 409

1.5 123 516 more than 249 581

1.6 435 091 less than 897 654

Puzzle!

• Complete the following magic square. The sum of the numbers down, across or diagonally is 90.

Time for self-assessment

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 1.8: We know this when the learner estimates and calculates by selecting and using operations appropriate to solving problems that involve:

1.8.2: addition and subtraction of whole numbers.

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 techniques to perform written and mental calculations with whole numbers including:

1.10.1: adding, subtracting and multiplying in columns.