1. A lesson to reinforce division and introduce decimal divisionH S
MIXED STARTER E
Andy says “There is only one pair of prime numbers which add to give 16”.
Show that Andy is wrong E
Write the smallest prime number which is larger than the 5th multiple of 6
Find two cube numbers whose sum is a square number S S
I am told to think of a number which is a multiple of 9, less than one hundred and a square number. How many different numbers could I be thinking about? P
The mean weight of a group of 4 people is 70kg.
A new person who weighs 85kg is added to the group.
Find the new mean
A lesson to reinforce division and introduce decimal division P
In two classes of 20 students there are always less boys than girls and the amount of boys and girls are prime numbers.
Both classes have a different mix of students
What fraction of the combined classes are boys?
LO: To perform decimal divisions

2. A lesson to reinforce division and introduce decimal division
Dividing
decimals
27/12/2018
Core: will be able to use basic written methods to multiply numbers and decimals by the powers of 10.
Challenge: will be able to divide an amount by a decimal.
Aspire: to divide decimals by other decimals
Vivo Star: Apply decimal division and understand its effect
Keywords: base, place value, units and powers of 10
A lesson to reinforce division and introduce decimal division
LO: To perform decimal divisions

3. A lesson to reinforce division and introduce decimal division
Bus stop division and place value M A T H S
ACQUIRE FLUENCY
(1)
0.9 x 10
(2)
0.5 x 10
(3)
0.3 x 10
(4)
0.15 x 10
(5)
4.3 x 10
(6)
1.7 x 100
(7)
3.4 x 100
(8)
6.21 x 100
(9)
4.1 x 100
(10)
5.8 x 100
(1)
240 ÷ 5 =
(2)
360 ÷ 12
(3)
585 ÷ 15
(4)
864 ÷ 4
A lesson to reinforce division and introduce decimal division
(1)
885 ÷ ?
= 15
(2)
2024 ÷
= 44
(3)
5616 ÷
= 72
(4)
9409 ÷
= 97
LO: To perform decimal divisions

4. A lesson to reinforce division and introduce decimal division
Dividing Decimals M A T H S
TALK ABOUT IT
200 ÷ 100 = 2
20 ÷ 10 = 2
2 ÷ 1 = 2
0.2 ÷ 0.1 = 2
What do you notice?
A lesson to reinforce division and introduce decimal division
Example question: 5.4 ÷ 0.06
LO: To perform decimal divisions

5. A lesson to reinforce division and introduce decimal division
Further Examples M A T H S
HAVE A GO
[IMC 1999 Q5] 30÷0.2 equals
Calculate: a) 22.8÷0.5 b) 5.376÷0.06 c) ÷ d) ÷1.1 e) ÷0.11
A death laser can fire every seconds. How many times can it fire in 3 minutes? 1 4
A rectangle has area cm2 and height 1.3cm.
What is its length?
What is its perimeter?
Calculate:
a) ÷0.16 b) ÷1.5
c) 610.8÷0.12 2
A lesson to reinforce division and introduce decimal division 3 5
LO: To perform decimal divisions

6. A lesson to reinforce division and introduce decimal division
Further Examples M A T H S
HAVE A GO
[IMC 1999 Q5] 30÷0.2 equals Solution: 150
Calculate: a) 22.8÷0.5=𝟒𝟓.𝟔 b) 5.376÷0.06=𝟖𝟗.𝟔 c) ÷0.007=𝟒𝟎𝟑𝟔𝟎𝟎 d) ÷1.1=𝟗.𝟔𝟑 e) ÷0.11=𝟗.𝟎𝟗𝟏
A death laser can fire every seconds. How many times can it fire in 3 minutes? Solution: 45000 1 4
A rectangle has area cm2 and height 1.3cm.
What is its length? 16.34cm
What is its perimeter? 35.28cm
Calculate:
a) ÷0.16=𝟎.𝟑𝟖𝟏𝟓 b) ÷1.5=𝟗𝟗.𝟗
c) 610.8÷0.12=𝟓𝟎𝟗𝟎 2
A lesson to reinforce division and introduce decimal division 3 5
LO: To perform decimal divisions

7. A lesson to reinforce division and introduce decimal division
Exam Question M A T H S
SUM IT UP
A lesson to reinforce division and introduce decimal division
Joanne is tiling her walls with a mosaic pattern.
Each square is 0.04m x 0.04m
The wall which Joanne wants to tile is 2.4m x 1.6m
How many small squares will be needed to cover this wall?
LO: To perform decimal divisions