Which two numbers (not digits) and which two signs should be interchanged to make the following equation correct?
24 ÷ 3 × 2 + 8 - 18 = 21
1
3, 18 and +, ×
2
8, 24 and +, ÷
3
3, 2 and -, ×
4
3, 8 and -, +
Which two numbers (not digits) and which two signs should be interchanged to make the following equation correct?
24 ÷ 3 × 2 + 8 - 18 = 21