Brug Mix (reeks 2)

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1. \(35 + 13 = \ldots\)
2. \(23 + 24 = \ldots\)
3. \(54 + 21 = \ldots\)
4. \(30 + 42 = \ldots\)
5. \(24 + 62 = \ldots\)
6. \(11 + 70 = \ldots\)
7. \(43 + 41 = \ldots\)
8. \(25 + 67 = \ldots\)
9. \(62 + 16 = \ldots\)
10. \(73 + 19 = \ldots\)
11. \(66 + 29 = \ldots\)
12. \(65 + 25 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 35 + 13\\= & \color{green}{30} + \color{red}{5} + \color{green}{10} + \color{red}{3} \\= & \color{green}{40} + \color{red}{8} \\= & \color{red}{48} \end{align}\)
2. \(\begin{align} & 23 + 24\\= & \color{green}{20} + \color{red}{3} + \color{green}{20} + \color{red}{4} \\= & \color{green}{40} + \color{red}{7} \\= & \color{red}{47} \end{align}\)
3. \(\begin{align} & 54 + 21\\= & \color{green}{50} + \color{red}{4} + \color{green}{20} + \color{red}{1} \\= & \color{green}{70} + \color{red}{5} \\= & \color{red}{75} \end{align}\)
4. \(\begin{align} & 30 + 42\\= &30 + \color{green}{40} + \color{red}{2} \\= & \color{green}{70} + \color{red}{2} \\= & \color{red}{72} \end{align}\)
5. \(\begin{align} & 24 + 62\\= & \color{green}{20} + \color{red}{4} + \color{green}{60} + \color{red}{2} \\= & \color{green}{80} + \color{red}{6} \\= & \color{red}{86} \end{align}\)
6. \(\begin{align} & 11 + 70\\= &70+11\\= &70 + \color{green}{10} + \color{red}{1} \\= & \color{green}{80} + \color{red}{1} \\= & \color{red}{81} \end{align}\)
7. \(\begin{align} & 43 + 41\\= & \color{green}{40} + \color{red}{3} + \color{green}{40} + \color{red}{1} \\= & \color{green}{80} + \color{red}{4} \\= & \color{red}{84} \end{align}\)
8. \(\begin{align} & 25 + 67\\= & \color{green}{20} + \color{red}{5} + \color{green}{60} + \color{red}{7} \\= & \color{green}{80} + \color{red}{12} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{90} + \color{red}{2} \\= & \color{red}{92} \end{align}\)
9. \(\begin{align} & 62 + 16\\= & \color{green}{60} + \color{red}{2} + \color{green}{10} + \color{red}{6} \\= & \color{green}{70} + \color{red}{8} \\= & \color{red}{78} \end{align}\)
10. \(\begin{align} & 73 + 19\\= & \color{green}{70} + \color{red}{3} + \color{green}{10} + \color{red}{9} \\= & \color{green}{80} + \color{red}{12} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{90} + \color{red}{2} \\= & \color{red}{92} \end{align}\)
11. \(\begin{align} & 66 + 29\\= & \color{green}{60} + \color{red}{6} + \color{green}{20} + \color{red}{9} \\= & \color{green}{80} + \color{red}{15} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{5} \\= & \color{orange}{90} + \color{red}{5} \\= & \color{red}{95} \end{align}\)
12. \(\begin{align} & 65 + 25\\= & \color{green}{60} + \color{red}{5} + \color{green}{20} + \color{red}{5} \\= & \color{green}{80} + \color{red}{10} \\= & \color{red}{90} \end{align}\)