Brug Mix (reeks 2)

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1. \(60 + 14 = \ldots\)
2. \(48 + 27 = \ldots\)
3. \(87 + 7 = \ldots\)
4. \(66 + 16 = \ldots\)
5. \(87 + 18 = \ldots\)
6. \(86 + 3 = \ldots\)
7. \(63 + 11 = \ldots\)
8. \(33 + 59 = \ldots\)
9. \(75 + 15 = \ldots\)
10. \(42 + 27 = \ldots\)
11. \(41 + 33 = \ldots\)
12. \(88 + 14 = \ldots\)

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Verbetersleutel

1. \(\begin{align} & 60 + 14\\= &60 + \color{green}{10} + \color{red}{4} \\= & \color{green}{70} + \color{red}{4} \\= & \color{red}{74} \end{align}\)
2. \(\begin{align} & 48 + 27\\= & \color{green}{40} + \color{red}{8} + \color{green}{20} + \color{red}{7} \\= & \color{green}{60} + \color{red}{15} \\= & \color{green}{60} + \color{orange}{10} + \color{red}{5} \\= & \color{orange}{70} + \color{red}{5} \\= & \color{red}{75} \end{align}\)
3. \(\begin{align} & 87 + 7\\= & \color{green}{80} + \color{red}{7} + \color{green}{0} + \color{red}{7} \\= & \color{green}{80} + \color{red}{14} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{4} \\= & \color{orange}{90} + \color{red}{4} \\= & \color{red}{94} \end{align}\)
4. \(\begin{align} & 66 + 16\\= & \color{green}{60} + \color{red}{6} + \color{green}{10} + \color{red}{6} \\= & \color{green}{70} + \color{red}{12} \\= & \color{green}{70} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{80} + \color{red}{2} \\= & \color{red}{82} \end{align}\)
5. \(\begin{align} & 87 + 18\\= & \color{green}{80} + \color{red}{7} + \color{green}{10} + \color{red}{8} \\= & \color{green}{90} + \color{red}{15} \\= & \color{green}{90} + \color{orange}{10} + \color{red}{5} \\= & \color{orange}{100} + \color{red}{5} \\= & \color{red}{105} \end{align}\)
6. \(\begin{align} & 86 + 3\\= & \color{green}{80} + \color{red}{6} + \color{green}{0} + \color{red}{3} \\= & \color{green}{80} + \color{red}{9} \\= & \color{red}{89} \end{align}\)
7. \(\begin{align} & 63 + 11\\= & \color{green}{60} + \color{red}{3} + \color{green}{10} + \color{red}{1} \\= & \color{green}{70} + \color{red}{4} \\= & \color{red}{74} \end{align}\)
8. \(\begin{align} & 33 + 59\\= & \color{green}{30} + \color{red}{3} + \color{green}{50} + \color{red}{9} \\= & \color{green}{80} + \color{red}{12} \\= & \color{green}{80} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{90} + \color{red}{2} \\= & \color{red}{92} \end{align}\)
9. \(\begin{align} & 75 + 15\\= & \color{green}{70} + \color{red}{5} + \color{green}{10} + \color{red}{5} \\= & \color{green}{80} + \color{red}{10} \\= & \color{red}{90} \end{align}\)
10. \(\begin{align} & 42 + 27\\= & \color{green}{40} + \color{red}{2} + \color{green}{20} + \color{red}{7} \\= & \color{green}{60} + \color{red}{9} \\= & \color{red}{69} \end{align}\)
11. \(\begin{align} & 41 + 33\\= & \color{green}{40} + \color{red}{1} + \color{green}{30} + \color{red}{3} \\= & \color{green}{70} + \color{red}{4} \\= & \color{red}{74} \end{align}\)
12. \(\begin{align} & 88 + 14\\= & \color{green}{80} + \color{red}{8} + \color{green}{10} + \color{red}{4} \\= & \color{green}{90} + \color{red}{12} \\= & \color{green}{90} + \color{orange}{10} + \color{red}{2} \\= & \color{orange}{100} + \color{red}{2} \\= & \color{red}{102} \end{align}\)