Brug Mix (reeks 2)

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1. \(66 + 14 = \ldots\)
2. \(44 + 36 = \ldots\)
3. \(25 + 63 = \ldots\)
4. \(83 + 8 = \ldots\)
5. \(30 + 15 = \ldots\)
6. \(26 + 24 = \ldots\)
7. \(12 + 67 = \ldots\)
8. \(37 + 46 = \ldots\)
9. \(32 + 18 = \ldots\)
10. \(13 + 55 = \ldots\)
11. \(21 + 57 = \ldots\)
12. \(57 + 15 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 66 + 14\\= & \color{green}{60} + \color{red}{6} + \color{green}{10} + \color{red}{4} \\= & \color{green}{70} + \color{red}{10} \\= & \color{red}{80} \end{align}\)
2. \(\begin{align} & 44 + 36\\= & \color{green}{40} + \color{red}{4} + \color{green}{30} + \color{red}{6} \\= & \color{green}{70} + \color{red}{10} \\= & \color{red}{80} \end{align}\)
3. \(\begin{align} & 25 + 63\\= & \color{green}{20} + \color{red}{5} + \color{green}{60} + \color{red}{3} \\= & \color{green}{80} + \color{red}{8} \\= & \color{red}{88} \end{align}\)
4. \(\begin{align} & 83 + 8\\= & \color{green}{80} + \color{red}{3} + \color{green}{0} + \color{red}{8} \\= & \color{green}{80} + \color{red}{11} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{1} \\= & \color{orange}{90} + \color{red}{1} \\= & \color{red}{91} \end{align}\)
5. \(\begin{align} & 30 + 15\\= &30 + \color{green}{10} + \color{red}{5} \\= & \color{green}{40} + \color{red}{5} \\= & \color{red}{45} \end{align}\)
6. \(\begin{align} & 26 + 24\\= & \color{green}{20} + \color{red}{6} + \color{green}{20} + \color{red}{4} \\= & \color{green}{40} + \color{red}{10} \\= & \color{red}{50} \end{align}\)
7. \(\begin{align} & 12 + 67\\= & \color{green}{10} + \color{red}{2} + \color{green}{60} + \color{red}{7} \\= & \color{green}{70} + \color{red}{9} \\= & \color{red}{79} \end{align}\)
8. \(\begin{align} & 37 + 46\\= & \color{green}{30} + \color{red}{7} + \color{green}{40} + \color{red}{6} \\= & \color{green}{70} + \color{red}{13} \\= & \color{green}{70} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{80} + \color{red}{3} \\= & \color{red}{83} \end{align}\)
9. \(\begin{align} & 32 + 18\\= & \color{green}{30} + \color{red}{2} + \color{green}{10} + \color{red}{8} \\= & \color{green}{40} + \color{red}{10} \\= & \color{red}{50} \end{align}\)
10. \(\begin{align} & 13 + 55\\= & \color{green}{10} + \color{red}{3} + \color{green}{50} + \color{red}{5} \\= & \color{green}{60} + \color{red}{8} \\= & \color{red}{68} \end{align}\)
11. \(\begin{align} & 21 + 57\\= & \color{green}{20} + \color{red}{1} + \color{green}{50} + \color{red}{7} \\= & \color{green}{70} + \color{red}{8} \\= & \color{red}{78} \end{align}\)
12. \(\begin{align} & 57 + 15\\= & \color{green}{50} + \color{red}{7} + \color{green}{10} + \color{red}{5} \\= & \color{green}{60} + \color{red}{12} \\= & \color{green}{60} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{70} + \color{red}{2} \\= & \color{red}{72} \end{align}\)