Brug met tienvoud

Hoofdmenu Eentje per keer  🖨

Reken uit

1. \(30 + 31 = \ldots\)
2. \(24 + 50 = \ldots\)
3. \(31 + 10 = \ldots\)
4. \(30 + 56 = \ldots\)
5. \(40 + 27 = \ldots\)
6. \(57 + 10 = \ldots\)
7. \(14 + 10 = \ldots\)
8. \(40 + 37 = \ldots\)
9. \(30 + 17 = \ldots\)
10. \(17 + 40 = \ldots\)
11. \(20 + 51 = \ldots\)
12. \(20 + 34 = \ldots\)

---

Reken uit

Verbetersleutel

1. \(\begin{align} & 30 + 31 \\= & 30 + \color{green}{30} + \color{red}{1} \\ = & \color{green}{60} + \color{red}{1} \\ = & \color{red}{61} \end{align}\)
2. \(\begin{align} & 24 + 50 \\ = & 50 + 24 \\= & 50 + \color{green}{20} + \color{red}{4} \\ = & \color{green}{70} + \color{red}{4} \\ = & \color{red}{74} \end{align}\)
3. \(\begin{align} & 31 + 10 \\ = & 10 + 31 \\= & 10 + \color{green}{30} + \color{red}{1} \\ = & \color{green}{40} + \color{red}{1} \\ = & \color{red}{41} \end{align}\)
4. \(\begin{align} & 30 + 56 \\= & 30 + \color{green}{50} + \color{red}{6} \\ = & \color{green}{80} + \color{red}{6} \\ = & \color{red}{86} \end{align}\)
5. \(\begin{align} & 40 + 27 \\= & 40 + \color{green}{20} + \color{red}{7} \\ = & \color{green}{60} + \color{red}{7} \\ = & \color{red}{67} \end{align}\)
6. \(\begin{align} & 57 + 10 \\ = & 10 + 57 \\= & 10 + \color{green}{50} + \color{red}{7} \\ = & \color{green}{60} + \color{red}{7} \\ = & \color{red}{67} \end{align}\)
7. \(\begin{align} & 14 + 10 \\ = & 10 + 14 \\= & 10 + \color{green}{10} + \color{red}{4} \\ = & \color{green}{20} + \color{red}{4} \\ = & \color{red}{24} \end{align}\)
8. \(\begin{align} & 40 + 37 \\= & 40 + \color{green}{30} + \color{red}{7} \\ = & \color{green}{70} + \color{red}{7} \\ = & \color{red}{77} \end{align}\)
9. \(\begin{align} & 30 + 17 \\= & 30 + \color{green}{10} + \color{red}{7} \\ = & \color{green}{40} + \color{red}{7} \\ = & \color{red}{47} \end{align}\)
10. \(\begin{align} & 17 + 40 \\ = & 40 + 17 \\= & 40 + \color{green}{10} + \color{red}{7} \\ = & \color{green}{50} + \color{red}{7} \\ = & \color{red}{57} \end{align}\)
11. \(\begin{align} & 20 + 51 \\= & 20 + \color{green}{50} + \color{red}{1} \\ = & \color{green}{70} + \color{red}{1} \\ = & \color{red}{71} \end{align}\)
12. \(\begin{align} & 20 + 34 \\= & 20 + \color{green}{30} + \color{red}{4} \\ = & \color{green}{50} + \color{red}{4} \\ = & \color{red}{54} \end{align}\)