Here’s the answers to today’s questions. Let me know how you got on with today’s learning.
TGB: odd and even numbers
Starter
2 x 10 = 20 20 ÷ 10 = 2
10 x 5 = 50 50 ÷ 5 = 10
6 x 10 = 60 60 ÷ 10 = 6
8 x 2 = 16 16 ÷ 2 = 8
7 x 5 = 35 35 ÷ 5 = 7
9 x 2 = 18 18 ÷ 2 = 9
10 x 2 = 20 20 ÷ 2 = 10
Here are some questions for you to have a go at.
Highlight the even numbers in the sequence.
| 12 | 13 | 14 | 15 | 16 |
| 54 | 55 | 56 | 57 | 58 |
| 26 | 28 | 30 | 32 | 34 |
Here are some questions for you to have a go at.
Highlight the odd numbers in the sequences
| 17 | 18 | 19 | 20 | 21 |
| 88 | 89 | 90 | 91 | 92 |
| 25 | 35 | 45 | 55 | 65 |
Here are some questions for you to have a go at.
If the numbers are even, what will they end in?
0,2,4,6,8
If the numbers are odd, what will they end in?
1,3,5,7,9
Here are some questions for you to have a go at.
Challenge- odd one out
Which number is the odd one out?
23 14 85
Why?
14 because it is even and the others are odd.
Challenge- odd one out
Which number is the odd one out?
15 43 28
Why?
28 because it is even and the others are odd.
Challenge- odd one out
Which number is the odd one out?
98 65 14
Why?
65 because it is odd and the others are even.
Investigation
Now I want you to do some investigating.
I’m going to give you a series of questions on the next few slides. I want you to find out the answers for me.
These might take you a little longer to work out and you will need more than one equation to prove it. 
Investigation-addition
If I add two even numbers together, what happens?
Is the answer odd or even?
even + even = even
Write three equations to backup your answer.
2 + 4 = 6 10 + 8 = 18 52 + 14 = 66
Investigation-addition
If I add two odd numbers together, what happens?
Is the answer odd or even?
odd + odd = even
Write three equations to backup your answer.
3 + 5 = 8 15 + 9 = 24 63 + 7 = 70
Investigation-addition
If I add an even number and an odd number together, what happens?
Is the answer odd or even?
even + odd = odd
Write three equations to backup your answer.
6 + 5 = 11 22 + 3 = 25 34 + 21 = 55
Investigation-subtraction
If I subtract an odd number from an odd number, what happens?
Is the answer odd or even?
odd – odd = even
Write three equations to backup your answer.
9 – 5 = 4 25 – 7 = 18 33 – 23 = 10
Investigation-subtraction
If I subtract an even number from an even number, what happens?
Is the answer odd or even?
even – even = even
Write three equations to backup your answer.
10 – 8 = 2 16 – 4 = 12 96 – 76 = 20
Investigation-subtraction
If I subtract an even number from an odd number, what happens?
Is the answer odd or even?
odd – even = odd
Write three equations to backup your answer.
15 – 6 = 9 33 – 2 = 31 55 – 12 = 43
Investigation-subtraction
If I subtract an odd number from an even number, what happens?
Is the answer odd or even?
even – odd = odd
Write three equations to backup your answer.
12 – 3 = 9 22 – 11 = 11 46 – 13 = 33
Investigation-multiplication
If I multiply an even number and an even number, what happens?
Is the answer odd or even?
even x even = even
Write three equations to backup your answer.
2 x 4 = 8 2 x 6 = 12 4 x 10 = 40
Investigation-multiplication
If I multiply an odd number and an odd number, what happens?
Is the answer odd or even?
odd x odd = odd
Write three equations to backup your answer.
1 x 3 = 3 3 x 5 = 15 5 x 7 = 35
Investigation-multiplication
If I multiply an odd number and an even number, what happens?
Is the answer odd or even?
odd x even = even
Write three equations to backup your answer.
5 x 2 = 10 3 x 10 = 30 7 x 6 = 42
Don’t forget to share pictures of your maths learning with me, you never know they might feature on the blog!
Enjoy your weekend!