Math · Stage 1
Count, read and write numbers to 20 (teen numbers as a ten and ones)
Count, read and write all the way to 20 — and see every teen number as 1 ten and some ones: 14 = 10 + 4.
✦ Math📘 Stage 1 · S1⏱ ~9 min🧒 Ages 5–6★ Free to start
I can count, read and write numbers to 20 (teen numbers as a ten and ones).
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Kavi's Acorn Baskets 🌰
Kavi lined up 14 acorns 🌰 and grinned. "Watch this trick!" Kavi scooped 10 into one basket — that makes one ten — and 4 acorns were left over as the ones. "Fourteen is just 1 ten and 4 ones," hooted Kavi. "Every teen number is a ten and some ones!"
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What your child will learn
1Make a full tenA ten-frame holds exactly 10. Tap Add 1 and fill every box. When all 10 boxes are full, you have made one ten — the start of every teen number.
2A teen is a ten and onesHere is 14. The teal counters are the ten (always 10), and the coral counters are the ones. Use ◀ less and more ▶ to change the ones and watch the teen number change.
3Count all the way to 20Start at 0 and hop +1 each time. Read every number out loud with Kavi: ten, eleven, twelve … all the way to twenty.
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A peek inside
Kavi counts 14 acorns 🌰. How can Kavi show 14 as a ten and ones?
14 = 10 + 4
Try this at home: Write the number: 1 ten and 5 ones = __
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Math · Stage 1 · S1 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.