Brøk – addisjon og subtraksjon 1: Spor I – fasit

SPOR I

Oppgave 1
a) \frac{2}{4}+\frac{1}{4}=\frac{3}{4} b) \frac{2}{7}+\frac{1}{7}=\frac{3}{7} c) \frac{1}{8}+\frac{3}{8}=\frac{4}{8}=\frac{1}{2}
d) \frac{4}{5}-\frac{2}{5}=\frac{2}{5} e) \frac{5}{6}-\frac{1}{6}=\frac{4}{6}=\frac{2}{3} f) \frac{3}{4}-\frac{1}{4}=\frac{2}{4}=\frac{1}{2}
g) \frac{1}{5}+\frac{2}{5}+\frac{1}{5}=\frac{4}{5} h) \frac{1}{6}+\frac{2}{6}+\frac{3}{6}=\frac{6}{6}=1 i) \frac{3}{10}+\frac{1}{10}+\frac{4}{10}=\frac{8}{10}=\frac{4}{5}
j) \frac{1}{3}+\frac{4}{3}-\frac{2}{3}=\frac{3}{3}=1 k) \frac{3}{10}-\frac{1}{10}+\frac{3}{10}=\frac{5}{10}=\frac{1}{2} l) \frac{5}{6}-\frac{1}{6}-\frac{2}{6}=\frac{2}{6}=\frac{1}{3}
 
Oppgave 2

a)\frac{3}{4}

b)\frac{1}{4}

c)\frac{4}{4}=1

 

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