Tidy Numbers Strategy

Walt: we are learning to use the making ten strategy Tidy numbers strategy. 1. 8+7=15

7-2=5 take the 2 and add it to the 8.

I know that 8+2=10.
So I take the 5 and add it to the 10.

So 5+10=15

2. 9+6=15

6-1=5 take the 1 and add it to the 9.

I know that 9+1=10.
So I take the 5 and add it to the 10.

So 5+10=15

Use the strategy I showed you to work out this 27+15 My favourite part was adding the numbers to work the equals out

Number bonds

Walt: We are learning number bonds to 10,20,50 and 100

Number Bonds 

1. To 10
    3+7=10
    4+6=10

2. To 20
    5+15=20
    8+12=20

3. To 50
    9+41=50
    1+49=50

4. To 100
    0+100=100
    3+97=100

5. What is a Number bond?
    A Number bond is two numbers that make a tidy number.

I liked doing number bonds because I got to add numbers together to make a tidy number.

What do you think a number bond is??