Starter
Practice counting in 10s starting from different numbers. Fill in the missing numbers below:
12  __  __  42  __  __
7 __  __  __  __  57
29  __  __  __  __  __
33  __  __  __  __  __
41  __  __  __  __  __

Main
LO: Adding 10 using a number line
We have learnt to add 1s on a number line. Now we are going to learn to add 10s on a number line. We already know how to add 10s using the 100 square but a number line will help us when we want to add larger numbers.

Follow these instructions then work out the calculations.

16 + 20 =
18 + 40 =
23 + 30 =
21 + 50 =
45 + 30 =
39 + 60 =
62 + 20 =
57 + 30 =
36 + 40 =
68 + 50 =

Extra Challenge:

Choose 2 of these numbers to add together:
32    40     6     20

How many different totals can you make ?
What is the greatest number you can make ?
What is the smallest number you can make ?