Grade 9 Mathematics Quiz 2

Which of the following numbers are:

√16 ; 0,6̇ ; −6,783 ; ∛25 ; 5¼; ∛−100; ∛−125; 25 ; √17

a) Natural numbers

b) Integers

c) Rational numbers

d) Irrational numbers

Determine without the use of a calculator:

a) −8² + (−5)² − (−4)³

b) {[−15 − (−3 + 2)] × 3} ÷ 6

c) ∛−64 + √64

d) 3⅕ × 1⅞

e) 2⅞ + 2½ × 7/10

f) What is the ½ of the sum of 5¾ and 2 2/8

g) How many times can you subtract 1 3/10 from 19½.

List the following : a) The prime numbers less than 36.

b) The prime factors of 36.

c) The even factors of 36.

d) The compound numbers less than 12.

a) Write 1⅝ as a decimal fraction.

b) Convert 1,23 to a percentage.

c) Convert 345% to a common fraction.

Write the following in scientific notation

a) 245 thousand

b) 30 millionths

c) 145 7000 000

d) 0, 000 000 000 067

e) 1,5 × 10⁵ × 5 × 10⁴

f) 2,3 × 10³ + 6,7 × 10⁴

Determine without the use of a calculator and give each answer in scientific and decimal notation. a) 8,4 ×10⁶ / 4×10³

b) 1,8 ×10^-6 / 3×10^-3