3 / 8 divided by [(1 / 5 + 1 / 4) x 3 / 8]

3 / 8 divided by [(1 / 5 + 1 / 4) x 3 / 8]

Three eighths divided by [(one fifth + one fourth) x three eighths]
=1 divided by (1 / 5 + 1 / 4)
=20/9

1 / 8 divided by 12.5 times (2 / 3 + 1 / 4) (simple calculation)

1 / 8 divided by 12.5 times (2 / 3 + 1 / 4) (simple calculation) = 1 / 8 ／ 12.5 × (2 / 3 + 1 / 4) = 1 ／ (8 × 12.5) × (11 / 12) = 1 / 100 × 11 / 12 = 11 / 1200; if you don't understand this question, please follow it up. If you are satisfied, please accept it. If you have any other questions, please send another one to me

Fill in the appropriate operation symbols (addition, subtraction, multiplication and division) in each box to make the following equation true
2□（-4）□6□（-8）=0
-8□（-2）□（-4）□（-6）=2

2+（-4）-6-（-8）=0
-8*（-2）/（-4）-（-6）=2

Add, subtract, multiply, divide, () to make the equation 5 5 15 = 8 3 8 3 = 24

5×(5-1÷5)=8÷(3-8÷3)=24.

If we define a * b = 4AB - (a + b), where the symbol * is an operation symbol specified by us, for example: 6 * 2 = 4x6x2 - (6 + 2) = 40
Find the value of: ① (- 4) * (- 2); ② (- 1) * 2

（-4）*（-2）
=4×（-4）×（-2）-【（-4）+（-2）】
=32+6
=38
（-1）*2
=4×（-1）×2-【（-1）+2】
=-8-1
=-9

If we define a * b = 4AB - (a + b), where the symbol * is a kind of operation symbol specified by us, for example: 6 * 2 = 4x6x2 - (6 + 2) = 40.: ① (- 4) * - 2
If we define a * b = 4AB - (a + b), where the symbol * is a kind of operation symbol specified by us, for example: 6 * 2 = 4x6x2 - (6 + 2) =: ① (- 4) * (- 2); ② (- 1) * 2

①（-4）*（-2）
=4×（-4）×（-2）-（-4-2）
=32+6
=38
②（-1）*2
=4×（-1）×2-（-1+2）
=-8-1
=-9

3 = 4, operation symbols are required, including brackets

（3*3+3）/3

3 () 3 () 3 = 4 what operation symbol should be filled in the brackets, excluding the brackets

(3x3+3)÷3=4