Math · Stage 1
Add 3-digit numbers with place-value blocks
Add 3-digit numbers with place-value blocks, trading 10 ones for 1 ten and 10 tens for 1 hundred when I need to.
✦ Math📘 Stage 1 · S1⏱ ~9 min🧒 Ages 5–6★ Free to start
add 3-digit numbers with place-value blocks, trading 10 ones for 1 ten and 10 tens for 1 hundred when I need to
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Ayu and the rambutans
Ayu sells rambutans at the pasar. In the morning she packs 248. After lunch she packs 35 more. Her brother asks how many she has. Ayu adds the ones and gets 13. She is not sure where the extra ten goes. Can we add big numbers and not lose a ten? By the end I can add big numbers with blocks and trade 10 ones for 1 ten.
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What your child will learn
1Warm up before the big numbers
2Flats, rods and cubes
3Build a number, then add the blocks
4Line up the digits in a column
5Estimate first, then add
6Trade 10 ones for 1 ten
7Trade 10 tens for 1 hundred
8Trade twice, then check
9Add to find the total
10Spot and fix four mistakes
11Check your thinking
12Build a sum with paper and beans
13What I can do now
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A peek inside
Build 237 with a flat, rods and cubes and write it as 200 + 30 + 7.
2 flats are worth 200<br>3 rods are worth 30<br>7 cubes are worth 7<br>200 + 30 + 7 = 237
Try this at home: Build 237 with a flat, rods and cubes and write it as 200 + 30 + 7.
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.