Make a calculation formula to become 10 using all four numbers of 3, 4, 7, 8 with some operation symbols among +, -, ×, /.
Answer
10 = (3 - 7/4) × 8
Reference
1 = (4 - 3) × (8 - 7)
2 = (4 - 3) + (8 - 7)
3 = 8 + 7 - 3 × 4
4 = 4 × 7 - 3 × 8
5 = (3 + 7) × 4 / 8
6 = 3 + 4 + 7 - 8
7 = 8 - 7/(3 + 4)
8 = 3 + 4 + 8 - 7
9 = 8 + 7/(3 + 4)
Answer
10 = (3 - 7/4) × 8
Reference
1 = (4 - 3) × (8 - 7)
2 = (4 - 3) + (8 - 7)
3 = 8 + 7 - 3 × 4
4 = 4 × 7 - 3 × 8
5 = (3 + 7) × 4 / 8
6 = 3 + 4 + 7 - 8
7 = 8 - 7/(3 + 4)
8 = 3 + 4 + 8 - 7
9 = 8 + 7/(3 + 4)
