Brug Mix (reeks 2)

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1. \(74 + 19 = \ldots\)
2. \(53 + 34 = \ldots\)
3. \(54 + 38 = \ldots\)
4. \(56 + 18 = \ldots\)
5. \(59 + 14 = \ldots\)
6. \(47 + 11 = \ldots\)
7. \(33 + 39 = \ldots\)
8. \(39 + 25 = \ldots\)
9. \(48 + 45 = \ldots\)
10. \(30 + 15 = \ldots\)
11. \(33 + 46 = \ldots\)
12. \(32 + 29 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 74 + 19\\= & \color{green}{70} + \color{red}{4} + \color{green}{10} + \color{red}{9} \\= & \color{green}{80} + \color{red}{13} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{90} + \color{red}{3} \\= & \color{red}{93} \end{align}\)
2. \(\begin{align} & 53 + 34\\= & \color{green}{50} + \color{red}{3} + \color{green}{30} + \color{red}{4} \\= & \color{green}{80} + \color{red}{7} \\= & \color{red}{87} \end{align}\)
3. \(\begin{align} & 54 + 38\\= & \color{green}{50} + \color{red}{4} + \color{green}{30} + \color{red}{8} \\= & \color{green}{80} + \color{red}{12} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{90} + \color{red}{2} \\= & \color{red}{92} \end{align}\)
4. \(\begin{align} & 56 + 18\\= & \color{green}{50} + \color{red}{6} + \color{green}{10} + \color{red}{8} \\= & \color{green}{60} + \color{red}{14} \\= & \color{green}{60} + \color{orange}{10} + \color{red}{4} \\= & \color{orange}{70} + \color{red}{4} \\= & \color{red}{74} \end{align}\)
5. \(\begin{align} & 59 + 14\\= & \color{green}{50} + \color{red}{9} + \color{green}{10} + \color{red}{4} \\= & \color{green}{60} + \color{red}{13} \\= & \color{green}{60} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{70} + \color{red}{3} \\= & \color{red}{73} \end{align}\)
6. \(\begin{align} & 47 + 11\\= & \color{green}{40} + \color{red}{7} + \color{green}{10} + \color{red}{1} \\= & \color{green}{50} + \color{red}{8} \\= & \color{red}{58} \end{align}\)
7. \(\begin{align} & 33 + 39\\= & \color{green}{30} + \color{red}{3} + \color{green}{30} + \color{red}{9} \\= & \color{green}{60} + \color{red}{12} \\= & \color{green}{60} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{70} + \color{red}{2} \\= & \color{red}{72} \end{align}\)
8. \(\begin{align} & 39 + 25\\= & \color{green}{30} + \color{red}{9} + \color{green}{20} + \color{red}{5} \\= & \color{green}{50} + \color{red}{14} \\= & \color{green}{50} + \color{orange}{10} + \color{red}{4} \\= & \color{orange}{60} + \color{red}{4} \\= & \color{red}{64} \end{align}\)
9. \(\begin{align} & 48 + 45\\= & \color{green}{40} + \color{red}{8} + \color{green}{40} + \color{red}{5} \\= & \color{green}{80} + \color{red}{13} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{90} + \color{red}{3} \\= & \color{red}{93} \end{align}\)
10. \(\begin{align} & 30 + 15\\= &30 + \color{green}{10} + \color{red}{5} \\= & \color{green}{40} + \color{red}{5} \\= & \color{red}{45} \end{align}\)
11. \(\begin{align} & 33 + 46\\= & \color{green}{30} + \color{red}{3} + \color{green}{40} + \color{red}{6} \\= & \color{green}{70} + \color{red}{9} \\= & \color{red}{79} \end{align}\)
12. \(\begin{align} & 32 + 29\\= & \color{green}{30} + \color{red}{2} + \color{green}{20} + \color{red}{9} \\= & \color{green}{50} + \color{red}{11} \\= & \color{green}{50} + \color{orange}{10} + \color{red}{1} \\= & \color{orange}{60} + \color{red}{1} \\= & \color{red}{61} \end{align}\)