Primtallsfaktorisering 1: Spor III – fasit

SPOR III

Oppgave 1

a) $172 =2\cdot2\cdot43$	b) $237 =3\cdot79$	c) $323 =17\cdot19$	d) $573 =3\cdot191$
e) $305 =5\cdot61$	f) $241$ er et primtall	g) $457$ er et primtall	h) $307$ er et primtall
i) $129 =3\cdot43$	j) $443$ er et primtall	k) $173$ er et primtall	l) $343 =7\cdot7\cdot7$
m) $119 =7\cdot17$	n) $267 =3\cdot89$	o) $747 =3\cdot3\cdot83$	p) $1001 = 7\cdot11\cdot13$

Oppgave 2

a) $\frac{12}{20}= \frac{3}{5}$	b) $\frac{15}{42} = \frac{5}{14}$	c) $\frac{21}{77} =\frac{3}{11}$	d) $\frac{91}{98} =\frac{13}{14}$
e) $\frac{52}{65} =\frac{4}{5}$	f) $\frac{42}{56} = \frac{3}{4}$	g) $\frac{32}{80} =\frac{2}{5}$	h) $\frac{54}{90} =\frac{3}{5}$

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