Revision Rockets

Answers

Q1) Calculate

4 1 5 ÷ 14 25
21 3 5 1 × 25 5 14 2 = 15 2 = 7 1 2

Q2) Calculate

3 3 4 ÷ 25 28
15 3 4 1 × 28 7 25 5 = 21 5 = 4 1 5

Q3) Find the lower bound of 6000 rounded to 1 s.f.

5500

Q4) Calculate

-3 × -5
15

Q5) Convert to standard form

1400
1.4× 10 3

Q6) Is this standard form?

87.7× 10 4
No