Use "+" - "to connect numbers 3, 20, 5 and 12 to form a formula. Can the result of this formula be 24? If not, please explain the reason; if yes, please write this formula. What if" 5 "is changed to" 6 "? Note that you can only use + - Oh, other words seem to be very good, but you can only use + - oh | Math enthusiast | Mathematical art

Use "+" - "to connect numbers 3, 20, 5 and 12 to form a formula. Can the result of this formula be 24? If not, please explain the reason; if yes, please write this formula. What if" 5 "is changed to" 6 "? Note that you can only use + - Oh, other words seem to be very good, but you can only use + - oh

In addition to the previous two algorithms, there are: (20 + 12) - (3 + 5) = 24
If you change "5" to "6", or use "+" and "-" to calculate, it is absolutely impossible, because only one of the four numbers is odd, and the settlement calculated with "+" - "is definitely odd, so it can not be 24

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