Odpowiedź :
a) 42 + 21 /62 - 53 = 63/9 = 7
b)7,4 + 1,44 /0,5 * 8 = 8,84/4 = 2,21
c) 2 1/10 + 3/5 = 2 1/10 + 6/10 = 2 7/10 = 2,7
2 8/18 - 1 1/6 = 2 8/18 - 1 3/18 = 1 5/18
d) 1 4/5 * 5/9 = 9/5 * 5/9 = 1/1 * 1/1 = 1 * 1 = 1
6/7 : 3/14 = 6/7 * 14/3 = 2/1 * 2/1 = 2 * 2 = 4
Liczę na naj^^
[tex]a) \frac{42 + 21}{62 - 53} = \frac{63}{9} = 7[/tex]
[tex]b) \frac{7.4 + 1.44}{0.5 \times 8} = \frac{8.84}{4} = 2.21[/tex]
[tex]c)2 \frac{1}{10} + \frac{3}{5} = 2 \frac{1}{10} + \frac{6}{10} = 2 \frac{7}{10} [/tex]
[tex]e)2 \frac{8}{18} - 1 \frac{1}{6} =2 \frac{4}{9} - 1 \frac{1}{6} = \frac{22}{9} - \frac{7}{6} = \frac{23}{18} = 1 \frac{5}{18} [/tex]
[tex]f) \frac{6}{7} \div \frac{3}{14} = \frac{84}{21} = 4[/tex]
[tex]d)1 \frac{4}{5} \times \frac{5}{9} = \frac{9}{5} \times \frac{5}{9} = \frac{45}{45} = 1[/tex]