Brug Mix (reeks 2)

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1. \(46 + 36 = \ldots\)
2. \(65 + 10 = \ldots\)
3. \(36 + 18 = \ldots\)
4. \(24 + 20 = \ldots\)
5. \(59 + 12 = \ldots\)
6. \(11 + 17 = \ldots\)
7. \(69 + 28 = \ldots\)
8. \(42 + 31 = \ldots\)
9. \(72 + 10 = \ldots\)
10. \(89 + 1 = \ldots\)
11. \(18 + 71 = \ldots\)
12. \(68 + 14 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 46 + 36\\= & \color{green}{40} + \color{red}{6} + \color{green}{30} + \color{red}{6} \\= & \color{green}{70} + \color{red}{12} \\= & \color{green}{70} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{80} + \color{red}{2} \\= & \color{red}{82} \end{align}\)
2. \(\begin{align} & 65 + 10\\= &10+65\\= &10 + \color{green}{60} + \color{red}{5} \\= & \color{green}{70} + \color{red}{5} \\= & \color{red}{75} \end{align}\)
3. \(\begin{align} & 36 + 18\\= & \color{green}{30} + \color{red}{6} + \color{green}{10} + \color{red}{8} \\= & \color{green}{40} + \color{red}{14} \\= & \color{green}{40} + \color{orange}{10} + \color{red}{4} \\= & \color{orange}{50} + \color{red}{4} \\= & \color{red}{54} \end{align}\)
4. \(\begin{align} & 24 + 20\\= &20+24\\= &20 + \color{green}{20} + \color{red}{4} \\= & \color{green}{40} + \color{red}{4} \\= & \color{red}{44} \end{align}\)
5. \(\begin{align} & 59 + 12\\= & \color{green}{50} + \color{red}{9} + \color{green}{10} + \color{red}{2} \\= & \color{green}{60} + \color{red}{11} \\= & \color{green}{60} + \color{orange}{10} + \color{red}{1} \\= & \color{orange}{70} + \color{red}{1} \\= & \color{red}{71} \end{align}\)
6. \(\begin{align} & 11 + 17\\= & \color{green}{10} + \color{red}{1} + \color{green}{10} + \color{red}{7} \\= & \color{green}{20} + \color{red}{8} \\= & \color{red}{28} \end{align}\)
7. \(\begin{align} & 69 + 28\\= & \color{green}{60} + \color{red}{9} + \color{green}{20} + \color{red}{8} \\= & \color{green}{80} + \color{red}{17} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{7} \\= & \color{orange}{90} + \color{red}{7} \\= & \color{red}{97} \end{align}\)
8. \(\begin{align} & 42 + 31\\= & \color{green}{40} + \color{red}{2} + \color{green}{30} + \color{red}{1} \\= & \color{green}{70} + \color{red}{3} \\= & \color{red}{73} \end{align}\)
9. \(\begin{align} & 72 + 10\\= &10+72\\= &10 + \color{green}{70} + \color{red}{2} \\= & \color{green}{80} + \color{red}{2} \\= & \color{red}{82} \end{align}\)
10. \(\begin{align} & 89 + 1\\= & \color{green}{80} + \color{red}{9} + \color{green}{0} + \color{red}{1} \\= & \color{green}{80} + \color{red}{10} \\= & \color{red}{90} \end{align}\)
11. \(\begin{align} & 18 + 71\\= & \color{green}{10} + \color{red}{8} + \color{green}{70} + \color{red}{1} \\= & \color{green}{80} + \color{red}{9} \\= & \color{red}{89} \end{align}\)
12. \(\begin{align} & 68 + 14\\= & \color{green}{60} + \color{red}{8} + \color{green}{10} + \color{red}{4} \\= & \color{green}{70} + \color{red}{12} \\= & \color{green}{70} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{80} + \color{red}{2} \\= & \color{red}{82} \end{align}\)