Brug Mix (reeks 2)

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1. \(59 + 34 = \ldots\)
2. \(55 + 30 = \ldots\)
3. \(28 + 25 = \ldots\)
4. \(88 + 1 = \ldots\)
5. \(84 + 0 = \ldots\)
6. \(73 + 18 = \ldots\)
7. \(14 + 32 = \ldots\)
8. \(56 + 28 = \ldots\)
9. \(40 + 12 = \ldots\)
10. \(63 + 12 = \ldots\)
11. \(38 + 51 = \ldots\)
12. \(19 + 60 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 59 + 34\\= & \color{green}{50} + \color{red}{9} + \color{green}{30} + \color{red}{4} \\= & \color{green}{80} + \color{red}{13} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{90} + \color{red}{3} \\= & \color{red}{93} \end{align}\)
2. \(\begin{align} & 55 + 30\\= &30+55\\= &30 + \color{green}{50} + \color{red}{5} \\= & \color{green}{80} + \color{red}{5} \\= & \color{red}{85} \end{align}\)
3. \(\begin{align} & 28 + 25\\= & \color{green}{20} + \color{red}{8} + \color{green}{20} + \color{red}{5} \\= & \color{green}{40} + \color{red}{13} \\= & \color{green}{40} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{50} + \color{red}{3} \\= & \color{red}{53} \end{align}\)
4. \(\begin{align} & 88 + 1\\= & \color{green}{80} + \color{red}{8} + \color{green}{0} + \color{red}{1} \\= & \color{green}{80} + \color{red}{9} \\= & \color{red}{89} \end{align}\)
5. \(\begin{align} & 84 + 0\\= &0+84\\= &0 + \color{green}{80} + \color{red}{4} \\= & \color{green}{80} + \color{red}{4} \\= & \color{red}{84} \end{align}\)
6. \(\begin{align} & 73 + 18\\= & \color{green}{70} + \color{red}{3} + \color{green}{10} + \color{red}{8} \\= & \color{green}{80} + \color{red}{11} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{1} \\= & \color{orange}{90} + \color{red}{1} \\= & \color{red}{91} \end{align}\)
7. \(\begin{align} & 14 + 32\\= & \color{green}{10} + \color{red}{4} + \color{green}{30} + \color{red}{2} \\= & \color{green}{40} + \color{red}{6} \\= & \color{red}{46} \end{align}\)
8. \(\begin{align} & 56 + 28\\= & \color{green}{50} + \color{red}{6} + \color{green}{20} + \color{red}{8} \\= & \color{green}{70} + \color{red}{14} \\= & \color{green}{70} + \color{orange}{10} + \color{red}{4} \\= & \color{orange}{80} + \color{red}{4} \\= & \color{red}{84} \end{align}\)
9. \(\begin{align} & 40 + 12\\= &40 + \color{green}{10} + \color{red}{2} \\= & \color{green}{50} + \color{red}{2} \\= & \color{red}{52} \end{align}\)
10. \(\begin{align} & 63 + 12\\= & \color{green}{60} + \color{red}{3} + \color{green}{10} + \color{red}{2} \\= & \color{green}{70} + \color{red}{5} \\= & \color{red}{75} \end{align}\)
11. \(\begin{align} & 38 + 51\\= & \color{green}{30} + \color{red}{8} + \color{green}{50} + \color{red}{1} \\= & \color{green}{80} + \color{red}{9} \\= & \color{red}{89} \end{align}\)
12. \(\begin{align} & 19 + 60\\= &60+19\\= &60 + \color{green}{10} + \color{red}{9} \\= & \color{green}{70} + \color{red}{9} \\= & \color{red}{79} \end{align}\)