3.11 To calculate by selecting appropriate operations for solving

Mathematics

Measurement and time

Area

Educator section

Memorandum

1.1 2 915,95 kg

1.2 1,998 kg

1.3 0,750 kg

1.4 26,082 kg

2.1 3,098 kg

2.2 4,104 kg

2.3 1,219 kg

2.4 18,797 kg

3.1 48,688 kg

3.2 15 272 kg

3.3 8 722 kg

3.4 238,117 g

3.5 0,320 kg

3.6 127,296 g

Leaner section

Content

Activity: to calculate by selecting appropriate operations for solving particular problems [lo 4.5]

Let's first see how well you are able to add and subtract without the help of a pocket calculator.

1. Reduce the following masses by 50 g:

1.1 2 916 kg = ________________________________ kg

1.2 2,048 kg = ________________________________ kg

1.3 0,800 kg = ________________________________ kg

1.4 26,132 kg = _______________________________ kg

2. Increase the following masses by 300 g:

2.1 2,798 kg = ________________________________ kg

2.2 3,804 kg = ________________________________ kg

2.3 0,919 kg = ________________________________ kg

2.4 18,497 kg = _______________________________ kg

3. Complete the calculations without the use of a calculator (first make units the same):

3.1 38,942 kg + 9,746 kg =

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3.2 6 913 kg + 8,359 t =

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3.3 9 t - 278 kg =

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3.4 18,517 g + 219,6 g =

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3.5 8 kg ÷ 25 =

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3.6 15,912 g × 8 =

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Assessment

Learning Outcome 4: The learner will be able to use appropriate measuring units, instruments and formulae in a variety of contexts.

Assessment Standard 4.5: We know this when the solves problems involving selecting, calculating with and converting between appropriate S.I. units listed above, integrating with appropriate Technology and Natural Sciences contexts.