Which two signs should be interchanged to make the given equation correct?
117 ÷ 13 + 16 × 540 - 40 = 644
1
÷ and+
2
+ and ×
3
- and +
4
÷ and -
Which two signs should be interchanged to make the given equation correct?
117 ÷ 13 + 16 × 540 - 40 = 644