Question

Write an expression that is equal to 8 using each number and symbol below exactly one time in the expression. Explain your thinking. 1 2 3 power of 3 + - ( )

Answer 1

Answer:

[3+ 1- (2 )]³

Step-by-step explanation:

[3+ 1- (2 )]³= 8

[ 4-2]³=8

[2]³= 8

The smaller brackets around 2 indicate that minus is being multiplied by 2 making it -2. As the signs of 1and 3 are the same i.e + they both are added and the answer is 4. Now 4 has the +ve  sign and 2 has the -ve sign so 2 is subtracted from 4 and we get a +ve 2 . Now 2 raise to power 3 gives 8 which is the required number.

Only 2 raised to power 3 gives a 8. any other number like 3 or 1 raise to power does not give an eight.