lesson
Ten more, ten less
Read with an adult. You can say, point, draw or write your answer.
1 · Learn
Adding ten adds one ten. The ones stay the same while the answer stays within our number range.
From 27, ten more is 37 and ten less is 17. We can count 17, 27, 37, 47 in ten-steps even though we did not start at zero.
2 · Worked example
I start at 64. One ten-step back gives 54; another gives 44.
3 · Your turn
Find ten more than 38 and ten less than 80.
Check your answer
48 and 70.
4 · Apply your learning
Use a hundred square to follow ten-steps forwards and backwards from different numbers.
Adult guidance and safety
Use practical objects before symbols. Read the task aloud when needed and ask the child to explain, not just name an answer. Revisit with different examples; one successful answer is not proof of fluency.
Open your writing and drawing pad
Write, draw or show your working. Use a mouse, pen or finger. This pad is not a submitted answer.
Not saved to your account. Download your drawing as PNG and your typed notes as TXT before leaving or refreshing. They are separate files. Do not enter private information.
Open a picture saved on this device to draw on it again. Opening replaces the drawing, but Undo can restore it. PNG only, up to 4 MB and 4096 × 4096 pixels. The picture stays in this browser; it is not uploaded. Paper lines in a saved picture become part of that picture.
Clear the drawing? Your typed notes will stay. You can undo this action.
Your pad is empty.
Open a UTF-8 TXT file from this device, up to 40 KB and 10,000 characters. It stays in this browser. Opening can be undone until you type again. Downloads keep a new copy; they do not change the file you opened.
Replace the notes on this page with the opened file? Download the current notes first if you want to keep them.
Typed notes are not submitted answers.
Practice this lesson
Lesson resources
Browse the available practice activities and worksheets for this lesson.
Your progress