Brug Mix (reeks 2)

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1. \(50 + 11 = \ldots\)
2. \(24 + 65 = \ldots\)
3. \(29 + 11 = \ldots\)
4. \(23 + 46 = \ldots\)
5. \(66 + 20 = \ldots\)
6. \(20 + 27 = \ldots\)
7. \(46 + 39 = \ldots\)
8. \(82 + 3 = \ldots\)
9. \(34 + 36 = \ldots\)
10. \(64 + 16 = \ldots\)
11. \(17 + 43 = \ldots\)
12. \(71 + 14 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 50 + 11\\= &50 + \color{green}{10} + \color{red}{1} \\= & \color{green}{60} + \color{red}{1} \\= & \color{red}{61} \end{align}\)
2. \(\begin{align} & 24 + 65\\= & \color{green}{20} + \color{red}{4} + \color{green}{60} + \color{red}{5} \\= & \color{green}{80} + \color{red}{9} \\= & \color{red}{89} \end{align}\)
3. \(\begin{align} & 29 + 11\\= & \color{green}{20} + \color{red}{9} + \color{green}{10} + \color{red}{1} \\= & \color{green}{30} + \color{red}{10} \\= & \color{red}{40} \end{align}\)
4. \(\begin{align} & 23 + 46\\= & \color{green}{20} + \color{red}{3} + \color{green}{40} + \color{red}{6} \\= & \color{green}{60} + \color{red}{9} \\= & \color{red}{69} \end{align}\)
5. \(\begin{align} & 66 + 20\\= &20+66\\= &20 + \color{green}{60} + \color{red}{6} \\= & \color{green}{80} + \color{red}{6} \\= & \color{red}{86} \end{align}\)
6. \(\begin{align} & 20 + 27\\= &20 + \color{green}{20} + \color{red}{7} \\= & \color{green}{40} + \color{red}{7} \\= & \color{red}{47} \end{align}\)
7. \(\begin{align} & 46 + 39\\= & \color{green}{40} + \color{red}{6} + \color{green}{30} + \color{red}{9} \\= & \color{green}{70} + \color{red}{15} \\= & \color{green}{70} + \color{orange}{10} + \color{red}{5} \\= & \color{orange}{80} + \color{red}{5} \\= & \color{red}{85} \end{align}\)
8. \(\begin{align} & 82 + 3\\= & \color{green}{80} + \color{red}{2} + \color{green}{0} + \color{red}{3} \\= & \color{green}{80} + \color{red}{5} \\= & \color{red}{85} \end{align}\)
9. \(\begin{align} & 34 + 36\\= & \color{green}{30} + \color{red}{4} + \color{green}{30} + \color{red}{6} \\= & \color{green}{60} + \color{red}{10} \\= & \color{red}{70} \end{align}\)
10. \(\begin{align} & 64 + 16\\= & \color{green}{60} + \color{red}{4} + \color{green}{10} + \color{red}{6} \\= & \color{green}{70} + \color{red}{10} \\= & \color{red}{80} \end{align}\)
11. \(\begin{align} & 17 + 43\\= & \color{green}{10} + \color{red}{7} + \color{green}{40} + \color{red}{3} \\= & \color{green}{50} + \color{red}{10} \\= & \color{red}{60} \end{align}\)
12. \(\begin{align} & 71 + 14\\= & \color{green}{70} + \color{red}{1} + \color{green}{10} + \color{red}{4} \\= & \color{green}{80} + \color{red}{5} \\= & \color{red}{85} \end{align}\)