Page 180 - New Medley 2 Semester 1
P. 180
Abacus Time
Show Numeral on the Abacus
An abacus is a counting tool. A three pin abacus can be used to
show numeral of a three digit number. The pin on the left is for
hundreds, in the middle is for tens and that on the right is for ones.
Suppose we wish to show 432 on the abacus.
432 = 4 hundreds + 3 tens + 2 ones.
This can be shown by 4 beads on H, 3 beads on T and
2 beads on O. H T O
EXERCISE 1.17
Draw the beads on the abacus to show the numeral.
1. 126 2. 452 3. 605
H T O H T O H T O
4. 547 5. 218 6. 873
H T O H T O H T O
7. 634 8. 861 9. 999
H T O H T O H T O
94
