TamilGenius Lab ยท tamilgeniuslab.com
เฎคเฎฎเฎฟเฎดเฏ เฎเฏเฎฉเฎฟเฎฏเฎธเฏ เฎฒเฏเฎชเฏ
Number Building Exercises
Number Building Exercises
Course: Abacus for Children โ Level 1
4 pages of number building exercises for numbers 10โ20 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.
Reference Examples
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.
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.
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.
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.
Score
36+ = Excellent ยท 28-35 = Good ยท below 28 = Review place value and repeat
Part of these learning packs
These packs include this resource alongside other printables, tools, and study guides โ curated for a specific goal. View all packs โ
TamilGenius Lab ยท tamilgeniuslab.com ยท Free Tamil-first education for every child
This is a premium resource. Print unlimited copies for personal and classroom use.