In this Year 3 Add 1s Across a 10 Mixed Activity, your children can practise their fluency, reasoning and problem-solving skills with adding 1-digit numbers to 3-digit numbers where the calculation crosses the ten. To make things easier for you, we've included an answer page that will speed up your marking process and save you time.

Use as part of your lesson, as an intervention, or send out as homework; the choice is yours. Don't forget to check out our other resources for this lesson. If you need more practise with any maths skill, we have resources for that!