It is a square number because 20 times 20 = 400
As a product of its prime factors: 2*2*5 = 20 or as 22*5 = 20
20
23 - (Parenthesis, Exponents, Division, Multiplication, Addition, Subtraction) The answer would be 23. (do the multiplication first) 4 x 5. (20) then add the three. (20 plus 3 = 23)
360
It depends on whether the operation is addition, subtraction, multiplication, division, exponentiation or some other binary operation. One of the simplest answers is 20+20 and 10+30
You can reduce multiplication to repeated additions. You could also replace the resulting additions by repeated incrementing. For example, to calculate 20 + 13, continue counting 13 numbers from 20. But that would be extremely boring and inefficient. Better if you just learn to do it the way they teach in school.
Let's say the question was 4x5. The answer is 20. If a division question 20 divided by 5, you know its 4 from the multiplication question.
4*5 + 6/3 = 20 + 2 = 22
It doesn't PEMDAS The order of operations Parentheses Exponents Multiplication Division Addition Subtration So do what's in the parentheses first 8+12=20 6-1=5 Now do your division 20/5-4 The correct answer is 4
Division is multiplication of the inverse. The inverse of a being a^-1 or 1/a. For example, 20 divided by five is the same as 20 times 5^-1, or 20*(1/5)=4
It is a square number because 20 times 20 = 400
|20| and |-20|
As a product of its prime factors: 2*2*5 = 20 or as 22*5 = 20
1 x 20 2 x 10 4 x 5
Always remember that multiplication is the inverse/opposite of division, so they can be used to check each other. For example: Let's say the problem is 120 / 6. Whatever you think is your answer, you can multiple by 6 and that result should be 120. Is 120 / 6 = 10? No. The quick check is 10 * 6 = 60, which does not equal 120. Is 120 / 6 = 20? Yes! We know this is right because 20 * 6 = 120.
14=14 and 20=20 All numbers have different values, and the only number equal to itself is itself.