Owl's Adding to 20 – Addition Worksheet (IB PYP Grade 1)

About This Worksheet

Move on to bigger numbers: add within 20 using number lines, picture groups and missing-number sums. This colourful, printable IB PYP Grade 1 Mathematics worksheet gives young learners focused practice with addition, with a friendly owl to guide them. It has a name, class and date box for students, the mindtested.com header and footer, and a teacher answer key on page 2.

What Questions Are in This Worksheet?

There are 4 activities worth 14 marks in total:

• Activity A: Six adding sums within 20.
• Activity B: Two bigger adding problems on a 0 to 20 number line.
• Activity C: Missing-number adding sums within 20.
• Activity D: Two adding stories within 20.

What Your Child Will Practise

• Doubles and near doubles
• Finding a missing number in an adding sum
• Adding two groups of pictures
• Counting on along a number line

How to Use This Worksheet

1. Print the PDF on A4 paper (colour is best, but black and white works too).
2. Read each instruction aloud together before your child starts.
3. Let your child try every activity independently first.
4. Mark with the answer key on page 2 and talk through any mistakes.

Tip: five to ten minutes of regular practice works better for Grade 1 learners than one long session. Colour in the owl when the worksheet is finished as a small reward.

Ideal for classroom use, homework, tutoring or home learning in the IB PYP Number strand, where learners add two groups, count on along a number line and use ten frames and doubles to add within 20. Answer key included.