FRAME NUMBER 7
LEVEL A
RULE NO. 1. Both terms of a ratio may be multiplied or divided by a same number without
changing the value of the ratio. Example
2x
2
=4
2
2
=1
2
=4
=1
4
2
8
4
2
2
4
8
2
Complete the following:
a. 4
x
2
=
b. 4
2
=
6
2
6
2
FRAME NUMBER 20
LEVEL B
IN A PROPORTION THE PRODUCT OF THE EXTREMES IS EQUAL TO THE PRODUCT
OF THE MEANS. Example: In proportion 3 = 6 or 3:5 = 6:10, product of extremes (3 and 10)
5
10
equals 30 and product of means (5 and 6) equals 30. Which one of the following is NOT a proportion?
a. 2:5 = 4:8
b. 3
x
9=
c. 2
x
6
=
5
15
3
9
FRAME NUMBER 33
LEVEL C
If 12 pieces of furniture cost , what will 27 pieces cost at the same rate?
15
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