Reken uit
- \(91 + \ldots = 100\)
- \(38 + \ldots = 40\)
- \(26 + \ldots = 30\)
- \(23 + \ldots = 30\)
- \(\ldots + 9 = 40\)
- \(35 + \ldots = 40\)
- \(29 + \ldots = 30\)
- \(\ldots + 2 = 40\)
- \(87 + \ldots = 90\)
- \(\ldots + 5 = 60\)
- \(\ldots + 8 = 30\)
- \(\ldots + 7 = 70\)
Reken uit
Verbetersleutel
- \(91 + 9 = 100\)
- \(38 + 2 = 40\)
- \(26 + 4 = 30\)
- \(23 + 7 = 30\)
- \(31 + 9 =40\)
- \(35 + 5 = 40\)
- \(29 + 1 = 30\)
- \(38 + 2 =40\)
- \(87 + 3 = 90\)
- \(55 + 5 =60\)
- \(22 + 8 =30\)
- \(63 + 7 =70\)