Brug over tiental

Hoofdmenu Eentje per keer  🖨

Reken uit

1. \(8 + 73 = \ldots\)
2. \(6 + 16 = \ldots\)
3. \(45 + 9 = \ldots\)
4. \(53 + 9 = \ldots\)
5. \(8 + 84 = \ldots\)
6. \(7 + 38 = \ldots\)
7. \(39 + 5 = \ldots\)
8. \(9 + 17 = \ldots\)
9. \(62 + 9 = \ldots\)
10. \(8 + 27 = \ldots\)
11. \(6 + 26 = \ldots\)
12. \(8 + 87 = \ldots\)

---

Reken uit

Verbetersleutel

1. \(\begin{align} & 8 + 73 \\= & 73 + 8 \\= & 73 + \color{green}{7} + \color{red}{1} \\= & \color{green}{80} + \color{red}{1} \\= & \color{red}{81} \end{align}\)
2. \(\begin{align} & 6 + 16 \\= & 16 + 6 \\= & 16 + \color{green}{4} + \color{red}{2} \\= & \color{green}{20} + \color{red}{2} \\= & \color{red}{22} \end{align}\)
3. \(\begin{align} & 45 + 9 \\= & 45 + \color{green}{5} + \color{red}{4} \\= & \color{green}{50} + \color{red}{4} \\= & \color{red}{54} \end{align}\)
4. \(\begin{align} & 53 + 9 \\= & 53 + \color{green}{7} + \color{red}{2} \\= & \color{green}{60} + \color{red}{2} \\= & \color{red}{62} \end{align}\)
5. \(\begin{align} & 8 + 84 \\= & 84 + 8 \\= & 84 + \color{green}{6} + \color{red}{2} \\= & \color{green}{90} + \color{red}{2} \\= & \color{red}{92} \end{align}\)
6. \(\begin{align} & 7 + 38 \\= & 38 + 7 \\= & 38 + \color{green}{2} + \color{red}{5} \\= & \color{green}{40} + \color{red}{5} \\= & \color{red}{45} \end{align}\)
7. \(\begin{align} & 39 + 5 \\= & 39 + \color{green}{1} + \color{red}{4} \\= & \color{green}{40} + \color{red}{4} \\= & \color{red}{44} \end{align}\)
8. \(\begin{align} & 9 + 17 \\= & 17 + 9 \\= & 17 + \color{green}{3} + \color{red}{6} \\= & \color{green}{20} + \color{red}{6} \\= & \color{red}{26} \end{align}\)
9. \(\begin{align} & 62 + 9 \\= & 62 + \color{green}{8} + \color{red}{1} \\= & \color{green}{70} + \color{red}{1} \\= & \color{red}{71} \end{align}\)
10. \(\begin{align} & 8 + 27 \\= & 27 + 8 \\= & 27 + \color{green}{3} + \color{red}{5} \\= & \color{green}{30} + \color{red}{5} \\= & \color{red}{35} \end{align}\)
11. \(\begin{align} & 6 + 26 \\= & 26 + 6 \\= & 26 + \color{green}{4} + \color{red}{2} \\= & \color{green}{30} + \color{red}{2} \\= & \color{red}{32} \end{align}\)
12. \(\begin{align} & 8 + 87 \\= & 87 + 8 \\= & 87 + \color{green}{3} + \color{red}{5} \\= & \color{green}{90} + \color{red}{5} \\= & \color{red}{95} \end{align}\)