Brug met tienvoud

Hoofdmenu Eentje per keer  🖨

Reken uit

1. \(17 + 30 = \ldots\)
2. \(50 + 18 = \ldots\)
3. \(20 + 25 = \ldots\)
4. \(52 + 40 = \ldots\)
5. \(37 + 50 = \ldots\)
6. \(12 + 20 = \ldots\)
7. \(10 + 39 = \ldots\)
8. \(36 + 30 = \ldots\)
9. \(10 + 19 = \ldots\)
10. \(10 + 32 = \ldots\)
11. \(22 + 10 = \ldots\)
12. \(60 + 36 = \ldots\)

---

Reken uit

Verbetersleutel

1. \(\begin{align} & 17 + 30 \\ = & 30 + 17 \\= & 30 + \color{green}{10} + \color{red}{7} \\ = & \color{green}{40} + \color{red}{7} \\ = & \color{red}{47} \end{align}\)
2. \(\begin{align} & 50 + 18 \\= & 50 + \color{green}{10} + \color{red}{8} \\ = & \color{green}{60} + \color{red}{8} \\ = & \color{red}{68} \end{align}\)
3. \(\begin{align} & 20 + 25 \\= & 20 + \color{green}{20} + \color{red}{5} \\ = & \color{green}{40} + \color{red}{5} \\ = & \color{red}{45} \end{align}\)
4. \(\begin{align} & 52 + 40 \\ = & 40 + 52 \\= & 40 + \color{green}{50} + \color{red}{2} \\ = & \color{green}{90} + \color{red}{2} \\ = & \color{red}{92} \end{align}\)
5. \(\begin{align} & 37 + 50 \\ = & 50 + 37 \\= & 50 + \color{green}{30} + \color{red}{7} \\ = & \color{green}{80} + \color{red}{7} \\ = & \color{red}{87} \end{align}\)
6. \(\begin{align} & 12 + 20 \\ = & 20 + 12 \\= & 20 + \color{green}{10} + \color{red}{2} \\ = & \color{green}{30} + \color{red}{2} \\ = & \color{red}{32} \end{align}\)
7. \(\begin{align} & 10 + 39 \\= & 10 + \color{green}{30} + \color{red}{9} \\ = & \color{green}{40} + \color{red}{9} \\ = & \color{red}{49} \end{align}\)
8. \(\begin{align} & 36 + 30 \\ = & 30 + 36 \\= & 30 + \color{green}{30} + \color{red}{6} \\ = & \color{green}{60} + \color{red}{6} \\ = & \color{red}{66} \end{align}\)
9. \(\begin{align} & 10 + 19 \\= & 10 + \color{green}{10} + \color{red}{9} \\ = & \color{green}{20} + \color{red}{9} \\ = & \color{red}{29} \end{align}\)
10. \(\begin{align} & 10 + 32 \\= & 10 + \color{green}{30} + \color{red}{2} \\ = & \color{green}{40} + \color{red}{2} \\ = & \color{red}{42} \end{align}\)
11. \(\begin{align} & 22 + 10 \\ = & 10 + 22 \\= & 10 + \color{green}{20} + \color{red}{2} \\ = & \color{green}{30} + \color{red}{2} \\ = & \color{red}{32} \end{align}\)
12. \(\begin{align} & 60 + 36 \\= & 60 + \color{green}{30} + \color{red}{6} \\ = & \color{green}{90} + \color{red}{6} \\ = & \color{red}{96} \end{align}\)