Odpowiedź :
a)
[tex]2 \frac{1}{5} + 1 \frac{3}{4} - 2 \frac{1}{20} = 2 \frac{4}{20} + 1 \frac{15}{20} - 2 \frac{1}{20} = 3 \frac{19}{20} - 2 \frac{1}{20} = 1 \frac{18}{20} [/tex]=1⁹/10
b)
[tex]4 \frac{1}{5} \div 1 \frac{1}{5} = \frac{21}{5} \div \frac{6}{5} = \frac{21}{5} \times \frac{5}{6} = \frac{21}{1} \times \frac{1}{6} = \frac{21}{6} = 3 \frac{3}{6} = 3 \frac{1}{2} [/tex]
c)
4⅞-¾×0,8=4 ⅞ - (¾×0,8)=
=4⅞-(¾×⁸/10)=4⅞-24/40=4 ³⁵/40-²⁴/40=4¹¹/40
Myślę że pomogłem ;)
Odpowiedź:
Szczegółowe wyjaśnienie:
2⅕ + 1 ¾ - 2 1/20 = 2 4/20 + 1 15/20 - 2 1/20 = 3 19/20 - 2 1/20 = 1 18/20 = 1 9/10
4 ⅕ : 1 ⅕ = 21/5 : 6/5 = 21/5 * 5/6 = 105/30 = 3 ½ = 3,5
4 ⅞ - ¾ * 0,8 = 4 ⅞ - ¾ * 8/10 = 4⅞ - ¾ * ⅘ = 4 ⅞ - 12/20 = 4 ⅞ - ⅗ = 4 35/40 - 24/40 = 4 11/40