1 of 4

=

x

=

x

=

÷

=

÷

3

7

21

2 of 4

=

x

=

x

=

÷

=

÷

8

8

64

3 of 4

=

x

=

x

=

÷

=

÷

72

8

9

4 of 4

=

x

=

x

=

÷

=

÷

?

?

?