Brug over tiental

Hoofdmenu Eentje per keer  🖨

Reken uit

1. \(5 + 59 = \ldots\)
2. \(88 + 5 = \ldots\)
3. \(8 + 86 = \ldots\)
4. \(84 + 7 = \ldots\)
5. \(45 + 9 = \ldots\)
6. \(7 + 24 = \ldots\)
7. \(23 + 8 = \ldots\)
8. \(44 + 8 = \ldots\)
9. \(29 + 6 = \ldots\)
10. \(73 + 9 = \ldots\)
11. \(4 + 87 = \ldots\)
12. \(9 + 42 = \ldots\)

---

Reken uit

Verbetersleutel

1. \(\begin{align} & 5 + 59 \\= & 59 + 5 \\= & 59 + \color{green}{1} + \color{red}{4} \\= & \color{green}{60} + \color{red}{4} \\= & \color{red}{64} \end{align}\)
2. \(\begin{align} & 88 + 5 \\= & 88 + \color{green}{2} + \color{red}{3} \\= & \color{green}{90} + \color{red}{3} \\= & \color{red}{93} \end{align}\)
3. \(\begin{align} & 8 + 86 \\= & 86 + 8 \\= & 86 + \color{green}{4} + \color{red}{4} \\= & \color{green}{90} + \color{red}{4} \\= & \color{red}{94} \end{align}\)
4. \(\begin{align} & 84 + 7 \\= & 84 + \color{green}{6} + \color{red}{1} \\= & \color{green}{90} + \color{red}{1} \\= & \color{red}{91} \end{align}\)
5. \(\begin{align} & 45 + 9 \\= & 45 + \color{green}{5} + \color{red}{4} \\= & \color{green}{50} + \color{red}{4} \\= & \color{red}{54} \end{align}\)
6. \(\begin{align} & 7 + 24 \\= & 24 + 7 \\= & 24 + \color{green}{6} + \color{red}{1} \\= & \color{green}{30} + \color{red}{1} \\= & \color{red}{31} \end{align}\)
7. \(\begin{align} & 23 + 8 \\= & 23 + \color{green}{7} + \color{red}{1} \\= & \color{green}{30} + \color{red}{1} \\= & \color{red}{31} \end{align}\)
8. \(\begin{align} & 44 + 8 \\= & 44 + \color{green}{6} + \color{red}{2} \\= & \color{green}{50} + \color{red}{2} \\= & \color{red}{52} \end{align}\)
9. \(\begin{align} & 29 + 6 \\= & 29 + \color{green}{1} + \color{red}{5} \\= & \color{green}{30} + \color{red}{5} \\= & \color{red}{35} \end{align}\)
10. \(\begin{align} & 73 + 9 \\= & 73 + \color{green}{7} + \color{red}{2} \\= & \color{green}{80} + \color{red}{2} \\= & \color{red}{82} \end{align}\)
11. \(\begin{align} & 4 + 87 \\= & 87 + 4 \\= & 87 + \color{green}{3} + \color{red}{1} \\= & \color{green}{90} + \color{red}{1} \\= & \color{red}{91} \end{align}\)
12. \(\begin{align} & 9 + 42 \\= & 42 + 9 \\= & 42 + \color{green}{8} + \color{red}{1} \\= & \color{green}{50} + \color{red}{1} \\= & \color{red}{51} \end{align}\)