Lesson 3:
Adding and subtracting ones from a 2 digit number.
 

Ask children if they can remember what numbers are made of:
56
How many tens?
How many ones?
Can they draw this number using dienes blocks? (A single line for the tens and a dot for the ones)

Warm up:
(Choose between:)
- counting in 2’s / 5’s /10’s /4’s / 8’s
- counting backwards from a chosen number between 0 and 100

Lesson 3 Oak Academy (see link below):
Adding and subtracting ones from a 2 digit number.
 

Ask children if they can remember what numbers are made of:
56
How many tens?
How many ones?
Can they draw this number using dienes blocks? (A single line for the tens and a dot for the ones)

Write down a couple of number sentences for them:
23 + 5 =
34 + 3 =

27 – 4 =
38 – 7 =

Remind the children that when they’re adding, we draw extra ones and when we’re taking away, we cross them out.

Children can have a go at the Oak Academy Lesson 3 sheet only.
(Press ‘Next’ until they get to the worksheet)