Brug Mix (reeks 2)

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1. \(60 + 24 = \ldots\)
2. \(35 + 15 = \ldots\)
3. \(12 + 24 = \ldots\)
4. \(31 + 53 = \ldots\)
5. \(61 + 10 = \ldots\)
6. \(64 + 29 = \ldots\)
7. \(40 + 41 = \ldots\)
8. \(11 + 75 = \ldots\)
9. \(88 + 5 = \ldots\)
10. \(79 + 19 = \ldots\)
11. \(16 + 51 = \ldots\)
12. \(44 + 38 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 60 + 24\\= &60 + \color{green}{20} + \color{red}{4} \\= & \color{green}{80} + \color{red}{4} \\= & \color{red}{84} \end{align}\)
2. \(\begin{align} & 35 + 15\\= & \color{green}{30} + \color{red}{5} + \color{green}{10} + \color{red}{5} \\= & \color{green}{40} + \color{red}{10} \\= & \color{red}{50} \end{align}\)
3. \(\begin{align} & 12 + 24\\= & \color{green}{10} + \color{red}{2} + \color{green}{20} + \color{red}{4} \\= & \color{green}{30} + \color{red}{6} \\= & \color{red}{36} \end{align}\)
4. \(\begin{align} & 31 + 53\\= & \color{green}{30} + \color{red}{1} + \color{green}{50} + \color{red}{3} \\= & \color{green}{80} + \color{red}{4} \\= & \color{red}{84} \end{align}\)
5. \(\begin{align} & 61 + 10\\= &10+61\\= &10 + \color{green}{60} + \color{red}{1} \\= & \color{green}{70} + \color{red}{1} \\= & \color{red}{71} \end{align}\)
6. \(\begin{align} & 64 + 29\\= & \color{green}{60} + \color{red}{4} + \color{green}{20} + \color{red}{9} \\= & \color{green}{80} + \color{red}{13} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{90} + \color{red}{3} \\= & \color{red}{93} \end{align}\)
7. \(\begin{align} & 40 + 41\\= &40 + \color{green}{40} + \color{red}{1} \\= & \color{green}{80} + \color{red}{1} \\= & \color{red}{81} \end{align}\)
8. \(\begin{align} & 11 + 75\\= & \color{green}{10} + \color{red}{1} + \color{green}{70} + \color{red}{5} \\= & \color{green}{80} + \color{red}{6} \\= & \color{red}{86} \end{align}\)
9. \(\begin{align} & 88 + 5\\= & \color{green}{80} + \color{red}{8} + \color{green}{0} + \color{red}{5} \\= & \color{green}{80} + \color{red}{13} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{3} \\= & \color{orange}{90} + \color{red}{3} \\= & \color{red}{93} \end{align}\)
10. \(\begin{align} & 79 + 19\\= & \color{green}{70} + \color{red}{9} + \color{green}{10} + \color{red}{9} \\= & \color{green}{80} + \color{red}{18} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{8} \\= & \color{orange}{90} + \color{red}{8} \\= & \color{red}{98} \end{align}\)
11. \(\begin{align} & 16 + 51\\= & \color{green}{10} + \color{red}{6} + \color{green}{50} + \color{red}{1} \\= & \color{green}{60} + \color{red}{7} \\= & \color{red}{67} \end{align}\)
12. \(\begin{align} & 44 + 38\\= & \color{green}{40} + \color{red}{4} + \color{green}{30} + \color{red}{8} \\= & \color{green}{70} + \color{red}{12} \\= & \color{green}{70} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{80} + \color{red}{2} \\= & \color{red}{82} \end{align}\)