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GCSE Mathematics. Targeting Grade C. Number Unit 1 Decimals. If not you need. Can you… Add and subtract decimals Multiply decimals Divide decimals Try a test. TOP : Review place value of decimals Practice 1: Add and subtract decimals Practice 2: Multiplying decimals

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GCSE Mathematics

Targeting Grade C

Number

Unit 1 Decimals


If not you need

  • Can you…

  • Add and subtract decimals

  • Multiply decimals

  • Divide decimals

  • Try a test

TOP: Review place value of decimals

Practice 1: Add and subtract decimals

Practice 2: Multiplying decimals

Practice 3: Dividing decimals

TAIL


Top Write the value of the underlined digits in the following

numbers.

  • 24.5

  • 364.36

  • 671.846

  • 5737.36

  • 8467.47234

  • 473.5483

Lesson


Practice 1: Add and subtract the following (remember to make sure

the decimal points are in line, especially with the whole numbers).

  • 4.96 + 6.3 (2) 6.92 – 3.48

    (3) 12.6 + 8.41 (4) 126.5 – 12.62

    (5) 100.4 – 83.6 (6) 147.62 + 25.13 – 19.2

    (7) 1596.5 + 154.258 (8) 357.25 – 159.29

    (9) 657.65 + 165 – 65.28 (10) 125 – 36.52 + 12.147

Lesson


Ignore the decimal points and multiply the numbers as normal (using long multiplication where necessary), then put the decimal point back at the end. REMEMBER there must be the same number of decimal places in the final answer as there was in the whole question!)

Practice 2: Multiply the following decimals:

  • 25.4  0.6

  • 1.26  1.3

  • 0.65  1.5

  • 36.4  5.8

  • 12.6  13

  • 6.4  9

  • 53.4  2.1

  • 23.4  0.12

Lesson


Divide as normal then put the decimal point above the one in the question

Practice 3: Find the answers to the following division problems:

  • 65.4  2 (2) 63.9  3

    (3) 126.34  5 (4) 1.76  10

    (5) 12.4  8 (6) 458.64  4

    (7) 21.54  6 (8) 21.81  7

    (9) 124.6  2 (10) 159.64  4

Lesson


Are you ready for the answers ? the question

TAIL

61.52

26.9 + 34.62

126.3 – 12.9

113.4

126.4  4

31.6

15.2  2.4

36.48

126.9 + 54

180.9

94.5  3

31.5

168.3

561  0.3

16.1

24 – 7.9

24.36 + 19.2 – 17.5

26.06

96.4 + 3.6 – 63.9

36.1

Lesson


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