Brug Mix (reeks 2)

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1. \(63 + 16 = \ldots\)
2. \(50 + 24 = \ldots\)
3. \(52 + 29 = \ldots\)
4. \(19 + 39 = \ldots\)
5. \(50 + 32 = \ldots\)
6. \(84 + 8 = \ldots\)
7. \(45 + 33 = \ldots\)
8. \(29 + 34 = \ldots\)
9. \(44 + 30 = \ldots\)
10. \(55 + 12 = \ldots\)
11. \(83 + 2 = \ldots\)
12. \(86 + 5 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 63 + 16\\= & \color{green}{60} + \color{red}{3} + \color{green}{10} + \color{red}{6} \\= & \color{green}{70} + \color{red}{9} \\= & \color{red}{79} \end{align}\)
2. \(\begin{align} & 50 + 24\\= &50 + \color{green}{20} + \color{red}{4} \\= & \color{green}{70} + \color{red}{4} \\= & \color{red}{74} \end{align}\)
3. \(\begin{align} & 52 + 29\\= & \color{green}{50} + \color{red}{2} + \color{green}{20} + \color{red}{9} \\= & \color{green}{70} + \color{red}{11} \\= & \color{green}{70} + \color{orange}{10} + \color{red}{1} \\= & \color{orange}{80} + \color{red}{1} \\= & \color{red}{81} \end{align}\)
4. \(\begin{align} & 19 + 39\\= & \color{green}{10} + \color{red}{9} + \color{green}{30} + \color{red}{9} \\= & \color{green}{40} + \color{red}{18} \\= & \color{green}{40} + \color{orange}{10} + \color{red}{8} \\= & \color{orange}{50} + \color{red}{8} \\= & \color{red}{58} \end{align}\)
5. \(\begin{align} & 50 + 32\\= &50 + \color{green}{30} + \color{red}{2} \\= & \color{green}{80} + \color{red}{2} \\= & \color{red}{82} \end{align}\)
6. \(\begin{align} & 84 + 8\\= & \color{green}{80} + \color{red}{4} + \color{green}{0} + \color{red}{8} \\= & \color{green}{80} + \color{red}{12} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{90} + \color{red}{2} \\= & \color{red}{92} \end{align}\)
7. \(\begin{align} & 45 + 33\\= & \color{green}{40} + \color{red}{5} + \color{green}{30} + \color{red}{3} \\= & \color{green}{70} + \color{red}{8} \\= & \color{red}{78} \end{align}\)
8. \(\begin{align} & 29 + 34\\= & \color{green}{20} + \color{red}{9} + \color{green}{30} + \color{red}{4} \\= & \color{green}{50} + \color{red}{13} \\= & \color{green}{50} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{60} + \color{red}{3} \\= & \color{red}{63} \end{align}\)
9. \(\begin{align} & 44 + 30\\= &30+44\\= &30 + \color{green}{40} + \color{red}{4} \\= & \color{green}{70} + \color{red}{4} \\= & \color{red}{74} \end{align}\)
10. \(\begin{align} & 55 + 12\\= & \color{green}{50} + \color{red}{5} + \color{green}{10} + \color{red}{2} \\= & \color{green}{60} + \color{red}{7} \\= & \color{red}{67} \end{align}\)
11. \(\begin{align} & 83 + 2\\= & \color{green}{80} + \color{red}{3} + \color{green}{0} + \color{red}{2} \\= & \color{green}{80} + \color{red}{5} \\= & \color{red}{85} \end{align}\)
12. \(\begin{align} & 86 + 5\\= & \color{green}{80} + \color{red}{6} + \color{green}{0} + \color{red}{5} \\= & \color{green}{80} + \color{red}{11} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{1} \\= & \color{orange}{90} + \color{red}{1} \\= & \color{red}{91} \end{align}\)