Oblicz:
a) (0,5)³ + (⅓)²=
b) (0,1)³ + (0,2)²=
c) 3 · (1⅔)² - 2 · (0,5)³=
d) (5¼ - 5,05)² - ¹/₂₅ =
e) 2,5 · 4½ - 5¹⁷/₂₀ ÷ 0,9=
f) (⅚ + ⅓) ÷ (2⅔ - 1,75)=
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a(0,5)³ + (⅓)²=⅛+¹/₉=⁹/₇₂+⁸/₇₂=¹⁷/₇₂
b) (0,1)³ + (0,2)²=0,001+0,008=0,009
c)3 · (1⅔)² - 2 · (0,5)³=3·²⁵/₉-2·⅛=⁷⁵/₉-¼=³⁰⁰/₃₆-⁹/₃₆=²⁹¹/₃₆=8¹/₁₂
d) (5¼ - 5,05)² - ¹/₂₅ =⁴⁴¹/₄-¹/₂₅=2.06
e) 2,5 · 4½ - 5¹⁷/₂₀ ÷ 0,9=11,25-¹¹⁷/₂₀·¹⁰/₉=11,¼-1,3=9,95
f) (⅚ + ⅓) ÷ (2⅔ - 1,75)=(⅚+²/₆):(³²/₁₂-²¹/₁₂)=⁷/₆·¹²/₁₁=¹⁴/₁₁=1³/₁₁
Oblicz:
a) (0,5)³ + (⅓)²=0,125+¹/₂₇=¹²⁵/₁₀₀₀+¹/₂₇=³³⁷⁵/₂₇₀₀₀+¹⁰⁰⁰/₂₇₀₀₀=⁴³⁷⁵/₂₇₀₀₀
b) (0,1)³ + (0,2)²=0,001+0,04=0,041
c) 3 · (1⅔)² - 2 · (0,5)³=3·²⁵/₉ - 2 · 0,125=²⁵/₃ - 0,25=²⁵/₃-²⁵₁₀₀=²⁵⁰⁰/₃₀₀-⁷⁵/₃₀₀=
=²⁴²⁵/₃₀₀=8 ²⁵/₃₀₀=8 ¹/₁₂
d) (5¼ - 5,05)² - ¹/₂₅ =(²¹/₄-⁵⁰⁵/₁₀₀)²-¹/₂₅=(⁵²⁵/₁₀₀-⁵⁰⁵/₁₀₀)²-¹/₂₅=(²⁰/₁₀₀)²-¹/₂₅=
=⁴⁰⁰/₁₀₀₀₀-¹/₂₅=⁴/₁₀₀-¹/₂₅=⁴/₁₀₀-⁴/₁₀₀=0
e) 2,5 · 4½ - 5¹⁷/₂₀ ÷ 0,9=2,5·4,5-5,85÷0,9=11,25-6,5=4,75
f) (⅚ + ⅓) ÷ (2⅔ - 1,75)=(⅚+²/₆)÷(⁸/₃-¹⁷⁵/₁₀₀)=⁷/₆÷(⁸⁰⁰/₃₀₀-⁵²⁵/₃₀₀)=
=⁷/₆÷²⁷⁵/₃₀₀=⁷/₆·³⁰⁰/₂₇₅=³⁵⁰/₂₇₅=1⁷⁵/₂₇₅=1³/₁₁