Free before and after numbers worksheets

How to Use These Worksheets

Strategies for helping your child with before and after numbers.

• Keep a number line visible while your child works — tape one to the desk or table. They can use it as a reference until the sequences become automatic. The goal is to wean off the number line gradually, not to memorize without understanding.
• Practice verbally before writing. Ask "what comes after 17?" during car rides, meals, or walks. Frequent low-stakes verbal practice builds speed and confidence faster than worksheets alone.
• When your child gets stuck on a decade crossing (like what comes after 39), count aloud together: 37, 38, 39... and let them hear that 40 comes next. Decade crossings need extra practice because the naming pattern changes.

Common Mistakes to Watch For

• Struggling specifically at decade boundaries — writing 20-10 instead of 30 after 29, or 40-10 instead of 50 after 49. These transitions need dedicated practice. Line up blocks in groups of 10 so kids can see that after the 29th block, you start a new group of ten.
• Confusing "before" and "after" — writing the number that comes after when the question asks for before. Use hand motions: point left for "before" and right for "after" while saying the words, until the directional association sticks.
• Always counting up from 1 to find the answer. If asked what comes before 18, a child counts 1, 2, 3... all the way to 17. This works but is inefficient. Practice counting backward from small numbers first (10, 9, 8...) to build reverse-counting fluency.
• Skipping numbers in the teens — jumping from 13 to 15 or from 16 to 18. The teens are irregular in English naming, so kids sometimes lose track. Practice the 10-20 range as a focused group.