Math · Stage 1
Find a hidden number that a symbol stands for using equal-parts clues
A shape can hide a number. When the parts are equal — like 🔺 + 🔺 = 10 — you can crack the code: 🔺 = 5.
✦ Math📘 Stage 1 · S1⏱ ~9 min🧒 Ages 5–6★ Free to start
I can find the hidden number a shape stands for using equal-parts clues.
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Kavi and the Mystery Shapes 🔺
Kavi finds a little puzzle card: 🔺 + 🔺 = 10. "Two triangles, and they are the same shape — so they stand for the same number," hoots Kavi. "Two equal parts that make 10 … that must be 5 and 5! So 🔺 = 5." Kavi grins. "When the parts are equal, I can always uncover the hidden number!"
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What your child will learn
1Two equal basketsKavi shares 10 berries into two equal baskets 🧺🧺. Each basket is a 🔺. Tap Add 1 to fill the first basket — the empty cells show the second basket.
2🔺 + 🔺 = 10A number bond shows two parts under one whole. Here both parts are the same shape 🔺 — same shape means same number, so the parts must be equal. It opens on the equal split. Use ◀ less / more ▶ to peek, then come back to the match.
3Equal hopsEqual parts can be more than two. Here each hop is an equal part of 2. Tap Hop +2 and count how many equal hops it takes to reach 12.
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A peek inside
The card says 🔺 + 🔺 = 10. Both parts are the same shape, so they are equal. What number does 🔺 stand for?
🔺 + 🔺 = 10 → 5 + 5 = 10
Try this at home: Equal parts! 🔺 + 🔺 = 6. What is 🔺? 🔺 = __
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.