Which two numbers should be interchanged to make the following equation correct?
20 + 21 × 78 ÷ 13 - 50 = 156
1
13 and 21
2
21 and 50
3
50 and 20
4
21 and 20
Which two numbers should be interchanged to make the following equation correct?
20 + 21 × 78 ÷ 13 - 50 = 156