16 - 8 = 8
900
When adding or subtracting, convert all fractions in the question to a common denominator/ 1/2 + 1/4 - 1/3 = 6/12 + 3/12 - 4/12 = 5/12
73
There is a decimal point missing from either after or before the 0: 0.18 → 0.18 to the nearest hundredth - it is already to the nearest hundredth; .018 = 0.018 → 0.02 to the nearest hundredth.
8563 to the nearest thousand equals 9000, since 5 before a number would round it up.
800 - 300 = 500
Addition and subtraction are prehistoric, they were used before man could write, even som animals addd and subtract (raven, crows, apes, etc.)
It can be helpful for people who do not have a clue where the decimal point should go in the answer. For those who do know, the exercise is pointless.
I learned to always change the denominators before adding or subtracting the numerators. You must always have a common denominator before adding or subtracting.
900
If you are adding or subtracting two numbers in scientific notation, you must rewrite one of the numbers to the same power of ten as the other, before performing the addition (or subtraction).
If your calculations result in figure that is very different from your estimate then you know there has been a mistake: either in your estimate or your calculation. It means that you do not blindly continue with an incorrect answer.
Aunt before Sally Addition before subtraction
Given 4 x - 2y = 7 And 3x - 3y = 15 Or simplified as x - y = 5 (dividing by 3) Now multiply by 2 and you get 2 x - 2y = 10 Here subtraction makes y eliminated So subtracting 2 x = - 3 ==> x = -3/2 Plugging we get y = -13/2
Do (multiplication/division) before you do (addition/subtraction).
400 + 500 = 900
BODMAS would say that addition is before subtraction. There is a main code "DMAS", which prove that: D:Divide M:Multiplication A:Addition S:Subtraction It proves that Addition is before Subtraction. HOPE U LIKE THAT:)