Addition (Class 1)

What this worksheet covers

This is a fifteen-question practice worksheet on addition up to 20 for Class 1, written to the pattern of the SOF International Mathematics Olympiad (IMO). It carries 18 marks and is designed to be attempted in 30 minutes, split across three sections — Adding Numbers, Addition Around Us and Achievers Section. Every question is multiple choice with exactly one correct option, and every one comes with a fully worked solution rather than just an answer key — so a child who gets one wrong can see where the reasoning went astray instead of only learning that it did.

Skills your child practises

• Applied problem-solving on addition up to 20 at Class 1 level
• Working accurately against a time limit, as the real paper demands
• Adding Numbers questions in the olympiad format
• Addition Around Us questions in the olympiad format
• Achievers Section questions in the olympiad format
• Reading worked solutions to find the step that went wrong

How to use it

1. 1There are 15 questions. Answer all of them.
2. 2Each question has four choices — (A), (B), (C) and (D). Only one is correct.
3. 3Questions 1–12 carry 1 mark each. Questions 13–15 carry 2 marks each.
4. 4There is no negative marking. Look at every picture carefully.

Sample questions from this worksheet

A preview of what's inside Addition (Class 1) — the PDF has the full set, and every question comes with a worked solution like these.

1. 1. 6 + 3 = ____

   • A8
   • B9correct
   • C10
   • D3
   Solution: Start at 6 and count on 3 more: 7, 8, 9.

2. 2. Meera has 6 red pencils and 8 blue pencils. How many pencils does she have altogether?

   • A12
   • B13
   • C14correct
   • D15
   Solution: 'Altogether' tells us to add.
   6 + 8 = 14 pencils.

3. 3. Which pair of numbers adds up to 15?

   • A7 and 8correct
   • B6 and 8
   • C9 and 5
   • D4 and 12
   Solution: Check each pair: 6 + 8 = 14, 7 + 8 = 15 ✓, 9 + 5 = 14, 4 + 12 = 16. Only 7 and 8 make 15.