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Number Building Exercises

Number Building Exercises

Course: Abacus for Children โ€” Level 1

Practice Sheet ยท Premium

4 pages of number building exercises for numbers 10โ€“20 with two-rod place value.

Abacus L1 โ€” Number Building Exercises (10-20)

40 problems across 4 pages. Given a number between 10 and 20, your child draws or marks the correct bead position using two rods: the tens rod and the ones rod.

Place Value โ€” Two Rods

Tens rod (T): second rod from the right. Each lower bead = 10, upper bead = 50.

Ones rod (O): rightmost rod. Each lower bead = 1, upper bead = 5.

Reading: add both rods together. Example: T=1, O=5 means 10+5 = 15.

T
โ—‹
โ—‹โ—‹โ—‹โ—
O
โ—
โ—‹โ—‹โ—‹โ—‹
= 15

Reference Examples

T
โ—‹
โ—‹โ—‹โ—‹โ—
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
= 10
T
โ—‹
โ—‹โ—‹โ—‹โ—
O
โ—‹
โ—‹โ—โ—โ—
= 13
T
โ—‹
โ—‹โ—‹โ—‹โ—
O
โ—
โ—‹โ—‹โ—‹โ—‹
= 15
T
โ—‹
โ—‹โ—‹โ—‹โ—
O
โ—
โ—‹โ—โ—โ—
= 18
T
โ—‹
โ—‹โ—‹โ—โ—
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
= 20

Page 1 of 4 โ€” Two-Rod Introduction

Parent instruction

Your child reads the number, then draws the correct bead positions on both the tens rod (T) and ones rod (O). The tens rod is on the left, ones rod on the right. Example: for 15, the tens rod shows 1 lower bead up, and the ones rod shows upper bead down.

1.10
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
2.12
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
3.15
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
4.11
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
5.14
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
6.17
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
7.13
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
8.16
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
9.18
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
10.19
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹

Page 2 of 4 โ€” Practice

Parent instruction

Remind your child: the tens rod tells how many tens, the ones rod tells how many ones. For each number, ask them to say aloud the tens and ones before drawing.

11.20
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
12.11
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
13.16
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
14.13
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
15.18
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
16.10
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
17.15
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
18.12
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
19.19
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
20.14
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹

Page 3 of 4 โ€” Speed Building

Parent instruction

Your child should be getting faster now. Encourage them to visualise the bead positions before drawing. If they hesitate on a number, go back to the reference.

21.17
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
22.20
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
23.14
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
24.10
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
25.16
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
26.19
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
27.11
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
28.13
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
29.18
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
30.15
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹

Page 4 of 4 โ€” Independent Practice

Parent instruction

Let your child work through this page independently. Check answers afterwards. If 8 or more are correct, they are ready to move on.

31.12
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
32.18
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
33.10
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
34.15
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
35.20
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
36.13
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
37.17
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
38.11
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
39.14
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹
40.16
T
โ—‹
โ—‹โ—‹โ—‹โ—‹
O
โ—‹
โ—‹โ—‹โ—‹โ—‹

Score

36+ = Excellent ยท 28-35 = Good ยท below 28 = Review place value and repeat

___ / 40
Page 1: ___ / 10
Page 2: ___ / 10
Page 3: ___ / 10
Page 4: ___ / 10

Part of these learning packs

Abacus Level 1 Support Pack

12 printable practice pages for Level 1 โ€” bead positions, number building, and first additions with parent instructions on every page

Read the number, draw the correct bead position. Covers 10โ€“20 with place value.

These packs include this resource alongside other printables, tools, and study guides โ€” curated for a specific goal. View all packs โ†’

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