Page 74 - MathGenius-C1-Flipbook

E:\Working\Orange_Education\Math_Genius_1\Open_Files\Chap_5
\ 03-Oct-2025 Bharat arora Proof-9 Reader’s Sign _______________________ Date __________

Numbers iN teNs aBaCus spikes

for a 2-digit number, we need an abacus Left Right
with two spikes. T O

The spike on the left is for the tens place. Tens Ones

The spike on the right is for the ones place. Place Place
Count, learn and write.

Tens Ones

10 = 1 0

T O 10

1 branch of 10 leaves 1 ten = 10 Ten

Tens Ones

20 = 2 0

T O 20
2 branches of 10 leaves each 2 tens = 20 Twenty

Tens Ones

30 = 3 0

T O 30

3 branches of 10 leaves each 3 tens = 30 Thirty

Tens Ones

40 = 4 0

T O 40

4 branches of 10 leaves each 4 tens = 40 Forty

Tens Ones

50 = 5 0

T O 50

5 branches of 10 leaves each 5 tens = 50 fifty

72 Mathematics-1