Brug Mix (reeks 2)

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1. \(18 + 61 = \ldots\)
2. \(14 + 53 = \ldots\)
3. \(36 + 29 = \ldots\)
4. \(17 + 32 = \ldots\)
5. \(32 + 14 = \ldots\)
6. \(82 + 0 = \ldots\)
7. \(66 + 28 = \ldots\)
8. \(25 + 44 = \ldots\)
9. \(58 + 32 = \ldots\)
10. \(72 + 16 = \ldots\)
11. \(41 + 23 = \ldots\)
12. \(26 + 38 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 18 + 61\\= & \color{green}{10} + \color{red}{8} + \color{green}{60} + \color{red}{1} \\= & \color{green}{70} + \color{red}{9} \\= & \color{red}{79} \end{align}\)
2. \(\begin{align} & 14 + 53\\= & \color{green}{10} + \color{red}{4} + \color{green}{50} + \color{red}{3} \\= & \color{green}{60} + \color{red}{7} \\= & \color{red}{67} \end{align}\)
3. \(\begin{align} & 36 + 29\\= & \color{green}{30} + \color{red}{6} + \color{green}{20} + \color{red}{9} \\= & \color{green}{50} + \color{red}{15} \\= & \color{green}{50} + \color{orange}{10} + \color{red}{5} \\= & \color{orange}{60} + \color{red}{5} \\= & \color{red}{65} \end{align}\)
4. \(\begin{align} & 17 + 32\\= & \color{green}{10} + \color{red}{7} + \color{green}{30} + \color{red}{2} \\= & \color{green}{40} + \color{red}{9} \\= & \color{red}{49} \end{align}\)
5. \(\begin{align} & 32 + 14\\= & \color{green}{30} + \color{red}{2} + \color{green}{10} + \color{red}{4} \\= & \color{green}{40} + \color{red}{6} \\= & \color{red}{46} \end{align}\)
6. \(\begin{align} & 82 + 0\\= &0+82\\= &0 + \color{green}{80} + \color{red}{2} \\= & \color{green}{80} + \color{red}{2} \\= & \color{red}{82} \end{align}\)
7. \(\begin{align} & 66 + 28\\= & \color{green}{60} + \color{red}{6} + \color{green}{20} + \color{red}{8} \\= & \color{green}{80} + \color{red}{14} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{4} \\= & \color{orange}{90} + \color{red}{4} \\= & \color{red}{94} \end{align}\)
8. \(\begin{align} & 25 + 44\\= & \color{green}{20} + \color{red}{5} + \color{green}{40} + \color{red}{4} \\= & \color{green}{60} + \color{red}{9} \\= & \color{red}{69} \end{align}\)
9. \(\begin{align} & 58 + 32\\= & \color{green}{50} + \color{red}{8} + \color{green}{30} + \color{red}{2} \\= & \color{green}{80} + \color{red}{10} \\= & \color{red}{90} \end{align}\)
10. \(\begin{align} & 72 + 16\\= & \color{green}{70} + \color{red}{2} + \color{green}{10} + \color{red}{6} \\= & \color{green}{80} + \color{red}{8} \\= & \color{red}{88} \end{align}\)
11. \(\begin{align} & 41 + 23\\= & \color{green}{40} + \color{red}{1} + \color{green}{20} + \color{red}{3} \\= & \color{green}{60} + \color{red}{4} \\= & \color{red}{64} \end{align}\)
12. \(\begin{align} & 26 + 38\\= & \color{green}{20} + \color{red}{6} + \color{green}{30} + \color{red}{8} \\= & \color{green}{50} + \color{red}{14} \\= & \color{green}{50} + \color{orange}{10} + \color{red}{4} \\= & \color{orange}{60} + \color{red}{4} \\= & \color{red}{64} \end{align}\)