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54% liczby:
17,5 × ⁵⁴/₁₀₀ = 9,45
b)
0,8 - (√1,44 ÷ 2²/₅ - ⁴/₅) ÷ (√¹/₆₄) +2 * 1450⁰ = 0,8 - (1,2 ÷ 2²/₅ - ⁴/₅) ÷ (¹/₈) + 2 * 1 = 0,8 - (½ - ⁴/₅) ÷ (¹/₈) + 2 = 0,8 - (⁵/₁₀ - ⁸/₁₀) ÷ (¹/₈) + 2 = 0,8 -( - ³/₁₀) ÷ (¹/₈) + 2 = ⁸/₁₀ -(- ³/₁₀)× (⁸/₁) +2 = ⁸/₁₀ - ( -¹²/₅) + 2 = ⁸/₁₀ + ²⁴/₁₀ + 2 = 5,2
jakim procentem
liczby 10 jest wartość wyrażenia:
10 -100%
5,2 - x
__________________________
10× x = 100×5,2
10x=520 /÷10
x=52%
;)