Number
Count on by 10s
10, 20...
30, 40, 50
5 + 5
10
10 - 2
8
How many sides does a triangle have
3
20 + 20
40
20 - 15
5
How many sides does a rectangle have
4
Name the Australian notes
Count by 2s from 13
13, 15, 17, 19, 21
30 + 30
60
34 - 14
20
6
$350
Count by 10s from 3
23 + 23
46
44 - 12
32
How many sides does an octagon have
8
8, 13, 18, 23, 28, 33
51 + 32
66 - 44
22
How many sides does a dodecagon have
12
If I buy 3 items ($4, $2.50 and $1.20). How much have I spent?
$7.70