Question

determine:

a) (-15) . 9 : √81
b) √100 - √64
c) (-13²) - √100 - (-6) + 9²
d) √144 + √100
e) √169 - √361

Answer 1

a) (-15) × 9 : √81

= (-15) × 9 : 9

= (-15) × 1

= -15

b) √100 - √64

= 10 - 8

= 2

c) (-13²) - √100 - (-6) + 9²

= 169 - 10 + 6 + 81

= 159 + 87

= 246

d) √144 + √100

= 12 + 10

= 22

e) √169 - √361

= 13 - 19

= -6