1. © Hamilton Trust Stepping Up Term 3 Week 7 Day 2
Addition – Objectives
Objective
Use mental strategies to add pairs of two-digit numbers with one decimal place.
You may need:
mini whiteboards
students’ books
© Hamilton Trust Stepping Up Term Week 7 Day 2

2. = 7.4 Addition – Direct Teaching 2.6 + = 10 7 0.4 10 2.6
Remember how to count on from a one-place
decimal to find the complement to 10…?
= 10 1 2 3 4 5 6 7 8 9 10
2.6
= 7.4
2.6 10
3.0
0.4 7
© Hamilton Trust Stepping Up Term Week 7 Day 2

3. Addition – Student Activity
Partner
talk
Work in pairs to write as many pairs of numbers with one decimal place, with a total of 10 as you can in two minutes!
© Hamilton Trust Stepping Up Term Week 7 Day 2

4. Addition – Direct Teaching
How does what we did last time help with these addition calculations…?
© Hamilton Trust Stepping Up Term Week 7 Day 2

5. Addition – Direct Teaching
We can use the same strategies for adding pairs of decimals and whole numbers!
Add and adjust… – 0.1
Number bonds… 0.3 and 0.7 make 1;
Partition…7 + 5, :
Count on…
© Hamilton Trust Stepping Up Term Week 7 Day 2

6. Addition – Individual Practice Another round of Addition Bingo...?
Choose any five of these numbers:
Arrange your totals in a 5-spot pattern.
First to cross off all 5 totals wins!
Eyes down…
2.8 and 2.3
6 more than 3.6
1.4 plus 7.5
2.4 add 1.3
Increase 3.6 by 3.9
1.2 plus 3.1
© Hamilton Trust Stepping Up Term Week 7 Day 2