Brug Mix (reeks 2)

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1. \(64 + 12 = \ldots\)
2. \(53 + 39 = \ldots\)
3. \(17 + 26 = \ldots\)
4. \(81 + 3 = \ldots\)
5. \(40 + 11 = \ldots\)
6. \(41 + 47 = \ldots\)
7. \(36 + 39 = \ldots\)
8. \(10 + 68 = \ldots\)
9. \(67 + 10 = \ldots\)
10. \(63 + 22 = \ldots\)
11. \(30 + 29 = \ldots\)
12. \(88 + 4 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 64 + 12\\= & \color{green}{60} + \color{red}{4} + \color{green}{10} + \color{red}{2} \\= & \color{green}{70} + \color{red}{6} \\= & \color{red}{76} \end{align}\)
2. \(\begin{align} & 53 + 39\\= & \color{green}{50} + \color{red}{3} + \color{green}{30} + \color{red}{9} \\= & \color{green}{80} + \color{red}{12} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{90} + \color{red}{2} \\= & \color{red}{92} \end{align}\)
3. \(\begin{align} & 17 + 26\\= & \color{green}{10} + \color{red}{7} + \color{green}{20} + \color{red}{6} \\= & \color{green}{30} + \color{red}{13} \\= & \color{green}{30} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{40} + \color{red}{3} \\= & \color{red}{43} \end{align}\)
4. \(\begin{align} & 81 + 3\\= & \color{green}{80} + \color{red}{1} + \color{green}{0} + \color{red}{3} \\= & \color{green}{80} + \color{red}{4} \\= & \color{red}{84} \end{align}\)
5. \(\begin{align} & 40 + 11\\= &40 + \color{green}{10} + \color{red}{1} \\= & \color{green}{50} + \color{red}{1} \\= & \color{red}{51} \end{align}\)
6. \(\begin{align} & 41 + 47\\= & \color{green}{40} + \color{red}{1} + \color{green}{40} + \color{red}{7} \\= & \color{green}{80} + \color{red}{8} \\= & \color{red}{88} \end{align}\)
7. \(\begin{align} & 36 + 39\\= & \color{green}{30} + \color{red}{6} + \color{green}{30} + \color{red}{9} \\= & \color{green}{60} + \color{red}{15} \\= & \color{green}{60} + \color{orange}{10} + \color{red}{5} \\= & \color{orange}{70} + \color{red}{5} \\= & \color{red}{75} \end{align}\)
8. \(\begin{align} & 10 + 68\\= &10 + \color{green}{60} + \color{red}{8} \\= & \color{green}{70} + \color{red}{8} \\= & \color{red}{78} \end{align}\)
9. \(\begin{align} & 67 + 10\\= &10+67\\= &10 + \color{green}{60} + \color{red}{7} \\= & \color{green}{70} + \color{red}{7} \\= & \color{red}{77} \end{align}\)
10. \(\begin{align} & 63 + 22\\= & \color{green}{60} + \color{red}{3} + \color{green}{20} + \color{red}{2} \\= & \color{green}{80} + \color{red}{5} \\= & \color{red}{85} \end{align}\)
11. \(\begin{align} & 30 + 29\\= &30 + \color{green}{20} + \color{red}{9} \\= & \color{green}{50} + \color{red}{9} \\= & \color{red}{59} \end{align}\)
12. \(\begin{align} & 88 + 4\\= & \color{green}{80} + \color{red}{8} + \color{green}{0} + \color{red}{4} \\= & \color{green}{80} + \color{red}{12} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{90} + \color{red}{2} \\= & \color{red}{92} \end{align}\)