Question

75-(3.5²-4.2²)

18:3+182+3.(51:17)

12{400:[500-(125+25.7)}]

15-25.8:(100.2)

Answer 1

75 - (3.5² - 4.2²)

= 75 - (3.25 - 4.4)

= 75 - (75 - 16)

= 75 - 75 + 16

= 16

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18 : 3 + 182 + 3.(51 : 17)

= 6 + 182 + 3.3

= 188 + 9

= 197

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12{400 : [500  - (125 + 25.7)]}

= 12{400 : [500 - (125 + 175)]}

= 12[400 : (500 - 300)]

= 12(400 : 200)

= 12.2

= 24

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15 - 25.8:(100.2)

= 15 - 25.8:50

= 15 - 200 : 50

= 15 - 4

= 11