Grade 5

Question 1

A number, x, rounded to three significant figures is 24100, write down the error interval for x

Answer 1

24050

Question 2

A number, y, rounded to two decimal places is 12.36, write down the error interval for y

Answer 2

12.355

Question 3

10 ( to the -2) x 2 ( to the -4)

Answer 3

put them in fractions first
10 ( to the -2) means 1 over 10 ( to the 2)

so it is one over 10 squared ( 100 ) x one over 2x2x2x2 (16)

one over 100 x one over 16 = one over 1600

Question 4

Which number describes the horizontal movement in a vector?

Answer 4

The top number