A team has 32 points and scores 9 more. Roughly, what is their new total? You already know how to count on in ones, so think about how you would get there. Would you count on nine ones from 32, or is there a faster route hiding in those numbers?

The number line will show four additions, each jumped a different way. Counting on is the route you already know, so watch how a big jump, partitioning and a near-double can be quicker. Before each jump is revealed, predict the landing number in your head.

Today we work through these additions together on the number line: 33 + 8, 42 + 30, 26 + 27, and 23 + 24. One pupil works at the board for each addition while the rest of the class follows along and predicts the landing number before it is confirmed. For each one, we choose a route first, then draw the jumps to land on the total.

A scoreboard is adding up totals: 43 + 6, 38 + 20, 27 + 28, and 49 + 49. We work through these together at the board. For each one, choose the route that saves the most steps, then draw the jumps and check.

What we learned today

• Good adders pick a smart route: count on, partition into tens and units, or lean on a near-double.
• The jumps on a number line show the route clearly.
• Big tidy numbers want one jump; two close numbers want a near-double.