How To Estimate

In this page you will learn about How To Estimate. Study or download the notes with questions and answers.

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Practice Questions And Answers

Give estimated answers to the following and also compare each with a calculated answer.

1.

692 x 28

Answers

692x28

≈700x30

=21000

(calculated answer) = 19 376

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Give estimated answers to the following and also compare each with a calculated answer.

2.

891-244-487

Answers

891-244-487

≈900-250-500

=150

(calculated answer) =150

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Give estimated answers to the following and also compare each with a calculated answer.

3.

328÷10,4

Answers

328÷10,4

≈300÷10

=30

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Note that “How To Estimate” is a sub topic and you can access more notes, questions and answers under the main topic “Operations On Numbers And Calculator Skills” which is in the CAPS Maths lit curriculum.

4.

Estimate the total value of the following shopping basket:

bread: R 12,99

atchar: R 14,50

butter: R 27,85

Tomato Sauce: R 3,22

Polony : R19,89

Answers

bread: R 12,99 ≈ R13

atchar: R 14,50 ≈ R15

butter: R 27,85 ≈ R30

Tomato Sauce: R 3,22 ≈ R3

Polony : R19,89 ≈ R20

Total Estimated Cost ≈ R13+R15+R30+R3+R20

≈ R81

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5.

Estimate the total value of the following shopping basket:

bread: R 12,99

atchar: R 14,50

butter: R 27,85

Tomato Sauce: R 3,22

Polony : R19,89

Answers

Estimated Number Of People ≈ 30% of 150

≈ 30% x 150

≈ 45

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