Brug Mix (reeks 2)

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1. \(41 + 48 = \ldots\)
2. \(84 + 0 = \ldots\)
3. \(27 + 33 = \ldots\)
4. \(78 + 15 = \ldots\)
5. \(62 + 21 = \ldots\)
6. \(73 + 15 = \ldots\)
7. \(72 + 13 = \ldots\)
8. \(53 + 21 = \ldots\)
9. \(11 + 19 = \ldots\)
10. \(80 + 6 = \ldots\)
11. \(24 + 25 = \ldots\)
12. \(33 + 12 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 41 + 48\\= & \color{green}{40} + \color{red}{1} + \color{green}{40} + \color{red}{8} \\= & \color{green}{80} + \color{red}{9} \\= & \color{red}{89} \end{align}\)
2. \(\begin{align} & 84 + 0\\= &0+84\\= &0 + \color{green}{80} + \color{red}{4} \\= & \color{green}{80} + \color{red}{4} \\= & \color{red}{84} \end{align}\)
3. \(\begin{align} & 27 + 33\\= & \color{green}{20} + \color{red}{7} + \color{green}{30} + \color{red}{3} \\= & \color{green}{50} + \color{red}{10} \\= & \color{red}{60} \end{align}\)
4. \(\begin{align} & 78 + 15\\= & \color{green}{70} + \color{red}{8} + \color{green}{10} + \color{red}{5} \\= & \color{green}{80} + \color{red}{13} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{90} + \color{red}{3} \\= & \color{red}{93} \end{align}\)
5. \(\begin{align} & 62 + 21\\= & \color{green}{60} + \color{red}{2} + \color{green}{20} + \color{red}{1} \\= & \color{green}{80} + \color{red}{3} \\= & \color{red}{83} \end{align}\)
6. \(\begin{align} & 73 + 15\\= & \color{green}{70} + \color{red}{3} + \color{green}{10} + \color{red}{5} \\= & \color{green}{80} + \color{red}{8} \\= & \color{red}{88} \end{align}\)
7. \(\begin{align} & 72 + 13\\= & \color{green}{70} + \color{red}{2} + \color{green}{10} + \color{red}{3} \\= & \color{green}{80} + \color{red}{5} \\= & \color{red}{85} \end{align}\)
8. \(\begin{align} & 53 + 21\\= & \color{green}{50} + \color{red}{3} + \color{green}{20} + \color{red}{1} \\= & \color{green}{70} + \color{red}{4} \\= & \color{red}{74} \end{align}\)
9. \(\begin{align} & 11 + 19\\= & \color{green}{10} + \color{red}{1} + \color{green}{10} + \color{red}{9} \\= & \color{green}{20} + \color{red}{10} \\= & \color{red}{30} \end{align}\)
10. \(\begin{align} & 80 + 6\\= &80 + \color{green}{0} + \color{red}{6} \\= & \color{green}{80} + \color{red}{6} \\= & \color{red}{86} \end{align}\)
11. \(\begin{align} & 24 + 25\\= & \color{green}{20} + \color{red}{4} + \color{green}{20} + \color{red}{5} \\= & \color{green}{40} + \color{red}{9} \\= & \color{red}{49} \end{align}\)
12. \(\begin{align} & 33 + 12\\= & \color{green}{30} + \color{red}{3} + \color{green}{10} + \color{red}{2} \\= & \color{green}{40} + \color{red}{5} \\= & \color{red}{45} \end{align}\)