Question

2/3 : 6/2 *

a) 2

b) 18/4

c) 2/9

d) 9/2

Calcule: (-2)³ - (-1)³ - 9¹ *

a) -1

b) -12

c) -13

d) -16

Calcule: √16 - √1 - √9 *

a) 1

b) -1

c) 0

d) 6

Calcule (0,2)³ - (1,2)²-0,9+2⁰ *

a) 1,232

b) 1,332

c) 1,233

d) 2,332

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Answer 1

Resposta:

2/3 : 6/2

= 2/3 x 2/6

= 1/3 x 2/3

= 1x2/3x3

= 2/3x3

= 2/9

( - 2 )³ - ( - 1 )³ - 9¹

= - 8 - ( - 1 )³ - 9¹

= - 8 - ( - 1 ) - 9¹

= - 8 - ( - 1 ) - 9

= - 16

√16 - √1 - √9

√16 = 4, √9 = 3

= √16 - 1 - √9

= 4 - 1 - 9

= 0

( 0,2 )³ - ( 1,2 )² - 0,9 + 2⁰

= 0,2³ - 1,2² - 0,9 + 1

= 0,2³ + 0,1 - 1,2²

= 0,008 + 0,1 - 1,2²

= - 1,332