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How do you subtract 10 percent from a number?
The naive way is to first calculate 10% of the given number and then subtract it from that number.The smarter way is to recognise that subtracting 10% is the same as leaving (100-10) = 90 percent. Since 90% is 0.9, simply multiply the given number by 0.9So, for example suppose you wish to subtract 10% from 67.3Method I:10% of 67.3 is 67.3*10/100 = 67.3*0.1 = 6.73then 67.3 - 6.73 = 60.57Method II90% of 67.3 is 67.3*90/100 = 67.3*0.9 = 60.57
What is the number when you add or multiply by itself you get the same number?
Prime number
What happens when you subtract a negative number from a positive number?
It's the same as adding a positive number.
How do you multiply by a odd number and prime number?
There is nothing special about either of those. Multiply them as you would any other numbers.
How do you change 0.42 to a fraction?
Multiply and divide it by the same number. For example; 42 / 100
You are thinking of a number you multiply it by 13 and subtract it by 119 you get the same answer if you multiply by 3 and subtract 9 what is your number?
Let the unknown number be x: 13x-119 = 3x-9 13x-3x = -9+119 10x = 110 x = 11 Substituting the value of x into original equation: 24 = 24
What single digit number can you multiply by 4 subtract 3 divide by 5 and add 2 to arrive at the same number that you started with?
7
No matter what number you begin with you'll end up with the same answer?
Pick a number between 8 and 20. double that number. subtract 16 from that answer. Multiply that result by 4. Divide that total by 8. add 15 to that answer. subtract the number that you started with.
Why does the denominator has to be the same?
it makes it eaiser to add subtract or divide or multiply
How do you subtract fractrions?
First, to subtract fractions, you need to make sure that the both have a common denominator. By this, I mean that they need to have the same number on the bottom of the fraction. If they are not the same, you need to multiply. Say you had this problem: 4/5 - 1/3 You will notice they don't have a common denominator. To make sure that the bottom is the same number, multiply 4/5 by 3 and 1/3 by 5. When you multiply, you do this to both the top and the bottom number. The problem now looks like this: 12/15 - 5/15 Now you're ready to subtract! All you have to do is subtract the top numbers, and keep the bottom ones the same. So: 4/5 - 1/3 = 7/15
You get the same result if you multiply a number by 7 or if you multiply the number by 2 and then add 20 Find the number?
Suppose the number is x. Then 7x = 2x + 20 Subtract 2x from both sides: 5x = 20 Divide both sides by 5: x = 4
Does an inequality sign change in an equation when both sides are multipled or divided by negative number?
The sign changes if you multiply/divide by a negative number. It stays the same if you add/subtract by a negative number.
How do you subtract 10 percent from a number?
The naive way is to first calculate 10% of the given number and then subtract it from that number.The smarter way is to recognise that subtracting 10% is the same as leaving (100-10) = 90 percent. Since 90% is 0.9, simply multiply the given number by 0.9So, for example suppose you wish to subtract 10% from 67.3Method I:10% of 67.3 is 67.3*10/100 = 67.3*0.1 = 6.73then 67.3 - 6.73 = 60.57Method II90% of 67.3 is 67.3*90/100 = 67.3*0.9 = 60.57
What is adding or subtracting two related quantities by the same number called?
It is called algebra. When two quantities are related as long as you do the same operation to both (add, subtract, multiply, or divide) you do not change the relation
Why would adding or subtracting the denominator and the numerator with a same number doesn't make an equivalent fraction of the original fraction?
You can divide or multiply the denominator and numerator by the same number and not change the fraction, but you cannot subtract or add to them by the same number. One way to look at this is algebra let the fraction be y = N/D where N = numerator and D = denominator then Dy = N in algebra you do not change the expression if you you do the same operation to both sides So let's multiply both sides by 10 10Dy = 10N y = N/D - nothing changed so it's OK to multiply Now try to subtract 10 from N; you cannot subtract 10 from D since is multiplied by y
How to subtract a fraction from a whole number?
Change the whole number into an improper fraction with the same denominator as the fraction and then subtract accordingly
1.Write a number down 1-9 2.Multiply by 2 3.Add 12 4.Subtract 4 5.Divide by 2?
The sAme you started with.
