Resolva as expressões numéricas:
A) - 2 . 9 + ( √49 - 3 . √1 + 4² ) - 20 ÷ 2 =
B) 3³ + ( - √49 + 2⁴ - 10° ) - 2³ =
C) (8² ÷ 2 - 5²) - 20 ÷ 2² - √4 =
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A) - 2 . 9 + ( √49 - 3 . √1 + 4² ) - 20 ÷ 2 =
B) 3³ + ( - √49 + 2⁴ - 10° ) - 2³ =
C) (8² ÷ 2 - 5²) - 20 ÷ 2² - √4 =
Me ajudem, por favor!!!
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A) - 2 . 9 + ( √49 - 3 . √1 + 4² ) - 20 ÷ 2 = -8
B) 3³ + ( - √49 + 2⁴ - 10° ) - 2³ = 27
C) (8² ÷ 2 - 5²) - 20 ÷ 2² - √4 = 0
A) - 2 . 9 + ( √49 - 3 . √1 + 4² ) - 20 ÷ 2 =
-2.9+(7-3.1+16)-20:2 =
-2.9+(7-3+16)-20:2 =
-2.9+(23-3)-20:2 =
-2.9+20-20:2 =
-2.9+20-10 =
-18+20-10 =
-28+20 = -8
B) 3³ + ( - √49 + 2⁴ - 10° ) - 2³ =
3^3+(-7+16-1)-2^3 =
3^3+(-8+16)-2^3 =
3^3+8-2^3 =
27+8-8 =
35-8 = 27
C) (8² ÷ 2 - 5²) - 20 ÷ 2² - √4 =
(64:2-25)-20:4-2 =
(32-25)-20:4-2 =
7-5-2 =
7-7 = 0
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