Brug Mix (reeks 2)

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1. \(58 + 14 = \ldots\)
2. \(79 + 19 = \ldots\)
3. \(51 + 20 = \ldots\)
4. \(76 + 16 = \ldots\)
5. \(44 + 39 = \ldots\)
6. \(30 + 41 = \ldots\)
7. \(65 + 14 = \ldots\)
8. \(84 + 16 = \ldots\)
9. \(69 + 27 = \ldots\)
10. \(86 + 12 = \ldots\)
11. \(85 + 6 = \ldots\)
12. \(20 + 33 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 58 + 14\\= & \color{green}{50} + \color{red}{8} + \color{green}{10} + \color{red}{4} \\= & \color{green}{60} + \color{red}{12} \\= & \color{green}{60} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{70} + \color{red}{2} \\= & \color{red}{72} \end{align}\)
2. \(\begin{align} & 79 + 19\\= & \color{green}{70} + \color{red}{9} + \color{green}{10} + \color{red}{9} \\= & \color{green}{80} + \color{red}{18} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{8} \\= & \color{orange}{90} + \color{red}{8} \\= & \color{red}{98} \end{align}\)
3. \(\begin{align} & 51 + 20\\= &20+51\\= &20 + \color{green}{50} + \color{red}{1} \\= & \color{green}{70} + \color{red}{1} \\= & \color{red}{71} \end{align}\)
4. \(\begin{align} & 76 + 16\\= & \color{green}{70} + \color{red}{6} + \color{green}{10} + \color{red}{6} \\= & \color{green}{80} + \color{red}{12} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{90} + \color{red}{2} \\= & \color{red}{92} \end{align}\)
5. \(\begin{align} & 44 + 39\\= & \color{green}{40} + \color{red}{4} + \color{green}{30} + \color{red}{9} \\= & \color{green}{70} + \color{red}{13} \\= & \color{green}{70} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{80} + \color{red}{3} \\= & \color{red}{83} \end{align}\)
6. \(\begin{align} & 30 + 41\\= &30 + \color{green}{40} + \color{red}{1} \\= & \color{green}{70} + \color{red}{1} \\= & \color{red}{71} \end{align}\)
7. \(\begin{align} & 65 + 14\\= & \color{green}{60} + \color{red}{5} + \color{green}{10} + \color{red}{4} \\= & \color{green}{70} + \color{red}{9} \\= & \color{red}{79} \end{align}\)
8. \(\begin{align} & 84 + 16\\= & \color{green}{80} + \color{red}{4} + \color{green}{10} + \color{red}{6} \\= & \color{green}{90} + \color{red}{10} \\= & \color{red}{100} \end{align}\)
9. \(\begin{align} & 69 + 27\\= & \color{green}{60} + \color{red}{9} + \color{green}{20} + \color{red}{7} \\= & \color{green}{80} + \color{red}{16} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{6} \\= & \color{orange}{90} + \color{red}{6} \\= & \color{red}{96} \end{align}\)
10. \(\begin{align} & 86 + 12\\= & \color{green}{80} + \color{red}{6} + \color{green}{10} + \color{red}{2} \\= & \color{green}{90} + \color{red}{8} \\= & \color{red}{98} \end{align}\)
11. \(\begin{align} & 85 + 6\\= & \color{green}{80} + \color{red}{5} + \color{green}{0} + \color{red}{6} \\= & \color{green}{80} + \color{red}{11} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{1} \\= & \color{orange}{90} + \color{red}{1} \\= & \color{red}{91} \end{align}\)
12. \(\begin{align} & 20 + 33\\= &20 + \color{green}{30} + \color{red}{3} \\= & \color{green}{50} + \color{red}{3} \\= & \color{red}{53} \end{align}\)