Which two numbers (not digits) and two signs should be interchanged to make the given equation correct?
18 ÷ 3 - 30 + 15 × 2 = -1
1
3 and 30; × and +
2
2 and 18; + and ×
3
15 and 3; + and -
4
18 and 15; + and -
Which two numbers (not digits) and two signs should be interchanged to make the given equation correct?
18 ÷ 3 - 30 + 15 × 2 = -1