LO:%20to%20use%20doubling%20and%20halving%20to%20multiply%20or%20divide%20two-digit%20numbers%20by%204. - PowerPoint PPT Presentation

Title: LO:%20to%20use%20doubling%20and%20halving%20to%20multiply%20or%20divide%20two-digit%20numbers%20by%204.


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LO to use doubling and halving to multiply or
divide two-digit numbers by 4.

• 17/05/05

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Two digit numbers
20
68
51
74
99
88
47
43
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LO to begin to express a quotient as a fraction
or a decimal when dividing whole numbers by 2, 4,
5 or 10p when dividing and p.
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LO to begin to express a quotient as a fraction
or a decimal when dividing whole numbers by 2, 4,
5 or 10p when dividing and p.
Any ideas anyone???
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What is the quotient of 17 divided by 4?
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What is the quotient of 17 divided by 4?

• 4 r1

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17 has been divided into 4 groups and the
REMAINDER of 1 should also be divided by 4.
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17 has been divided into 4 groups and the
REMAINDER of 1 should also be divided by 4.
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0 4 8 12
16 20
10
0 4 8 12
16 20
11
0 4 8 12
16 20
12
0 4 8 12
16 20
What fraction of the jump is the remainder?
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0 5 10 15
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17 divided by 5 could be 3 r2 OR 3 2/5
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2/5What is this as a decimal?

• 2
• 5

4 10
40 100
40
0.4
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Task 17/05/05

• LO to express a quotient as a fraction and a
  decimal

Work in pairs to divide each of the following
numbers by 2, 4, 5 and 10. 35 53
67 47
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It costs 5.40 for four children to go swimming.
How much does it cost each child?
It costs 11.80 for 4 adults to go skating. How
much does it cost each adult?
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Lets get thinking backwards!
!sdrawkcab gnikniht teg steL

• What number have I halved to get a quotient of 61
  ½?

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Lets get thinking backwards!
!sdrawkcab gnikniht teg steL

• What number have I quartered to get a quotient of
  22.25?