Transcript to use doubling and halving to multiply or divide two

LO: to use doubling and halving
to multiply or divide two-digit
numbers by 4.
17/05/05
Two digit numbers:
51
20
68
74
99
88
43
47
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.
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???
What is the quotient of:
17 divided by 4?
What is the quotient of:
17 divided by 4?
4 r1
17 has been divided into 4
groups and the REMAINDER of
1 should also be divided by 4.
17 has been divided into 4
groups and the REMAINDER of
1 should also be divided by 4.
0
4
8
12
16
20
0
4
8
12
16
20
0
4
8
12
16
20
0
4
8
12
16
20
What fraction of the jump is the remainder?
0
5
10
15
20
17 divided by 5 could be 3 r2 OR 3 2/5
2/5
What is this as a decimal?
2
5
4
10
40
100
0.4
40%
• LO: to express a quotient as a fraction
and a decimal
Task:
17/05/05
Work in pairs to divide each of the following numbers by 2,
4, 5 and 10.
35
67
53
47
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?
Let’s get thinking backwards!
!sdrawkcab gnikniht teg s’teL
What number have I
halved to get a quotient
of 61 ½?
Let’s get thinking backwards!
!sdrawkcab gnikniht teg s’teL
What number have I
quartered to get a
quotient of 22.25?