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22 a<br />
b<br />
c<br />
d<br />
4800 kr.<br />
1200 kr.<br />
1800 kr.<br />
900 kr.<br />
8700 kr.<br />
Bls. 33<br />
23 a 5 • 10 + 5 • 2 = __________ b 5 • 12 = __________ 60<br />
_______ 50 + ______ 10 = __________ 60<br />
b 4 • 80 + 4 • 5 = __________ 4 • 85 = _________ 340<br />
_______ 320 + ______ 20 = __________ 340<br />
c 3 • 200 + 3 • 50 + 3 • 1 = __________ 3 • 251 = _________ 753<br />
_______ 600 + ______ 150 + ______ 3 = __________ 753<br />
d 7 • 500 + 7 • 80 + 7 • 5 = __________ 7 • 585 = _________ 4095<br />
_______ 3500 + ______ 560 + ______ 35 = __________ 4095<br />
e 8 • 400 + 8 • 20 + 8 • 1 = __________ 8 • 421 = _________ 3368<br />
_______ 3200 + ______ 160 + ______ 8 = __________ 3368<br />
f<br />
Sömu dæmi reiknuð á mismunandi hátt.<br />
24 a Hva›a tölu fær›u ____________________<br />
5510<br />
Hva› segja tveir sí› ustu tölu stafirn ir flér<br />
___________________________________<br />
Aldur minn<br />
55 · 2 = 110<br />
110 + 5 = 115<br />
115 · 50 = 5750<br />
5750 + 10 + 365 = 6125<br />
6125 – 615 = 5510<br />
<strong>Geisli</strong> <strong>1B</strong> – Lausnir – © Námsgagnastofnun 2011 – 09073<br />
..... Reikniaðgerðir<br />
25
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