Why not playing with arithmetic with the Balances ?. The rules are easy : you have to put the sign + or - in each box such that each side is equal. This is an excelent way to exerce your mental calculation.
1)
The printable files PDF.
Puzzle : bal_3X15_0093.pdf
Solution : bal_3X15_0093_sol.pdf
2)
The printable files PDF.
Puzzle : bal_3X15_0097.pdf
Solution : bal_3X15_0097_sol.pdf
3)
The printable files PDF.
Puzzle : bal_4X15_0082.pdf
Solution : bal_4X15_0082_sol.pdf
4)
The printable files PDF.
Puzzle : bal_4X15_0083.pdf
Solution : bal_4X15_0083_sol.pdf
5)
The printable files PDF.
Puzzle : bal_4X15_0084.pdf
Solution : bal_4X15_0084_sol.pdf
Have a good day !
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