Log in
Home Page
Talking Maths
Listen carefully
You did a fantastic job yesterday recording you addition number bonds to 20.
We are going to use these today to work out the subtraction number bonds from 20.
Listen carefully
Listen carefully
Remember we can use our addition bonds to help work out the answer to subtractions from 20.
If we know
2 + 18 = 20
Then we know
20 - 2 = 18
20 - 18 = 2
Use what you know about your number bonds to work out these calculations.
Write the calculation and answer in your book and send you teacher a picture.
20 - 7 = 20 - 13 =
20 - 16 = 20 - 4 =
20 - 5 = 20 - 15 =
Did you notice anything about these calculations?
If you did tell your teacher.