Øvingsoppgaver med fasit

Regn i hodet:

$$\begin{gathered} 4823+934 \\ 1482+347 \\ 2643+981 \end{gathered}$$

Regn i hodet:

$$\begin{gathered} 1824+3641 \\ 2145+386 \\ 249+3547 \end{gathered}$$

Still opp og regn ut:

$$\begin{gathered} 12,8+9,23 \\ 17,15+8,79 \\ 14,87+6,3 \end{gathered}$$

Regn ut:

$$\begin{gathered} -1,3+2,3 \\ -2,0+5,3 \\ -1,9+3,0 \end{gathered}$$

Regn ut:

$$\begin{gathered} -2,1+5,4 \\ -1,7+3,6 \\ -2,5+5,4 \end{gathered}$$

Regn ut:

$$\begin{gathered} -235+241 \\ -132+624 \\ -361+400 \end{gathered}$$

Still opp og finn sifrene som mangler:

$$\begin{gathered} \mathrm{...4},\mathrm{...4...}+\mathrm{8...},\mathrm{7...8}=117,269 \\ \mathrm{5...},\mathrm{9...8}+\mathrm{...8},\mathrm{...5...}=80,077 \end{gathered}$$

Regn i hodet:

$$\begin{gathered} 1872+354 \\ 3614+825 \\ 247+6448 \end{gathered}$$

Still opp og regn ut:

$$\begin{gathered} 264,14+8,9 \\ 38,7+61,48 \\ 158,8+19,73 \end{gathered}$$

Still opp og regn ut:

$$\begin{gathered} 0,00456+0,28 \\ 14,29+36,18424 \\ 148,975+364,247 \end{gathered}$$