Adding and subtracting within 20 — mental calculation

P1 Mathematics · Number & Algebra · 165 questions · difficulty D1–D5 · Singapore MOE-aligned

Sample questions

More P1 Mathematics topics

• Counting to tell the number of objects in a given set
• Number notation, representations and place values (tens, ones) up to 100
• Reading and writing numbers in numerals and words up to 100
• Comparing and ordering numbers up to 100
• Patterns in number sequences
• Ordinal numbers (1st to 10th)