Page 63 - STEPS MATHEMATICS 4A

6-spike numbers 6-spike abacus,
6 beads, RM 80

Work with a friend if you can. put six beads on this abacus
to show an odd number between
10000 and 20000.

drew the beads on RM 80
and wrote the number.

13.003

Use 6 beads, a 6-spike abacus and RM80.
Find and record a number which is:

a a 4-digit number with no zeros in it
b a 5-digit number with a zero in the thousands column

c an even number between 40000 and 50000
d the smallest even number
e the smallest 6-digit number

f the largest 5-digit odd number
g the smallest 5-digit number ending in '000'

h the largest 5-digit number ending in '000'.

CHALLENGE

Fit these 4 loose spikes on the abacus
in different ways to find twelve 6-digit odd numbers.

Draw each abacus and write the number it shows.