CHALLENGE 1
MIND SQUEEZE
In each box, choose a sign: +, –, × or = to make the calculation correct. You can
use the same operation more than once.
1 10 = 4 × 3 – 2
2 7 2 = 10 4
3 3 7 11 = 10
4 7 3 2 = 8
5 19 5 3 4
6 3 5 1 16
7 5 4 3 2
8 2 4 3 5
9 2 6 1 4
10 8 6 7 2