Maths Revision 4

42 = 6 x 7 and 36 = 4 x 9

so 42 x 36 =

• 6 x 7 x 4 x 9

• 4 x 9 x 6 x 7

• 4 x 6 x 7 x 9

• 6 x 4 x 9 x 7

• All of the above

3 x 7 x 4 x 2 = 21 x 8

• True

• False

6 x 3 x 5 x 4 = 18 x 21 ?

• True

• False

Round the number 325 to 1 significant figure.

• 300

• 320

• 330

• 321

Round 43,574 to 1 significant figure

• 43,000

• 40,000

• 43600

• 43570

A number rounded to 1 significant figure only has ONE number that is not zero

• True

• False

• Like this ... 4300?

• Like this ... 4000?

What is this number to 1 significant figure?

0.03215

• 0.03215

• 0.0322

• 0.032

• 0.03

What is this number to 1 significant figure?

0.000453

• 0.04

• 0.004

• 0.0004

• 0.0005

 $\frac{3}{5}\ =\ \frac{a}{15}$  what is a?

• 3

• 6

• 9

• 12

 $\frac{1}{3}\ =\ \ \frac{b}{15}$  what is b?

• 1

• 5

• 10

• 15