If the two signs, '+ and ÷ ' are interchanged, which of the following equations will be correct?

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
 65 * 45 * 25 * 5 * 35 * 60

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 25 * 2 * 220 * 11 * 43

Which of the following interchanges in signs and numbers will make the given equation correct?

8 x 9 + 2 = 74

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 25 * 5 * 10 * 2 * 8 * 11

Select the correct combination of mathematical signs to sequentially replace the # signs and to balance the given equation.
 [{(44 # 38) # (2 # 5)} # (4 # 2)] # 5 # 10

Select the correct combination of mathematical signs to replace the * signs and balance the given equation.
 21 * 4 * 156 * 13 * 11 = 83

In a certain language, if the signs + and ×, and the digits 3 and 8 are interchanged, then what is the value of the following expression?
 6 × 35 ÷ 5 + 8 – 9