Math · Stage 3
Measure in standard units and convert between them (mm/cm/m, g/kg, ml/l)
Every big unit is made of smaller ones — step up ÷ by 10, 100 or 1000; step down × the same.
✦ Math📘 Stage 3 · S3⏱ ~11 min🧒 Ages 7–8★ Free to start
I can measure in standard units and convert between them (mm/cm/m, g/kg, ml/l).
📖
Kavi's Market Stall 🛒
Kavi is weighing fruit and pouring juice at the market. "A ribbon is 2 m long, a melon is 3 kg heavy, and the bottle holds 1 l of juice," hoots Kavi. "But I can say them the small way too — 2 m is 200 cm, 3 kg is 3000 g, 1 l is 1000 ml! Every big unit is just lots of little ones."
🎓
What your child will learn
1The length ladder: mm · cm · m
2A ruler counts in tens of mmA ruler is a numberline! Each hop of 10 mm is exactly 1 cm. Start at 0 and tap Hop +10: 10, 20, 30, 40, 50.
3The thousand club: g → kg, ml → l
4Which measure fits?
🔍
A peek inside
A pencil is 4 cm long. How many mm is that?
cm → mm is the small way → × 10 → 4 × 10
Try this at home: Length: 1 cm = __ mm · 5 cm = __ mm · 1 m = __ cm
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Math · Stage 3 · S3 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.