2.7 To perform mental calculations

Mathematics

Multiplication

Educator section

Memorandum

1.1 6

1.2 96

1.3 150

1.4 500

1.5 12

1.6 42

1.7 5

1.8 1 000 000

1.9 9 900

1.10 63 000

1.11 524

1.12 66

1.13 100

1.14 578

1.15 768½ / 768,5

Leaner section

Content

Activity: to perform mental calculations [lo 1.9.2]

If you have attended well during the previous activities, the following mental calculation test should be child's play! Let us see how well you manage.

1. Complete the following:

1.1 ____________________ x 9 = 54

1.2 ____________________ ÷ 8 = 12

1.3 6 x 25 = ____________________

1.4 4 x 125 = ____________________

1.5 6 x ____________________ = 72

1.5 ____________________ ÷ 6 = 7

1.6 45 ÷ ____________________ = 9

1.7 106 = ____________________

1.8 104 - 102 = ____________________

1.9 63 x 103 = ____________________

1.10 (5 x 102) + (6 x 4) = ____________________

1.11 (13 x 6) – (4 x 3) = ____________________

1.12 105 ÷ 103 = ____________________

1.13 Double: 289: ____________________

1.14 Halve: 1 537: ____________________

• Colour in the applicable block:

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 1.9: We know this when the learner performs mental calculations involving:

1.9.2: multiplication of whole numbers to at least 12 x 12.