Bạn đang xem: 1/2 + 1/4 + 1/8 + 1/16 + ⋯
Result:
2 một nửa = 2 một nửa = 2 · 2 + 50% = 4 + 50% = 5/2 = 2 50% = 2.5
Spelled result in words is five halfs (or two và one half).Conversion a mixed number 2 một nửa to a improper fraction: 2 một nửa = 2 một nửa = 2 · 2 + một nửa = 4 + 50% = 5/2To find a new numerator:a) Multiply the whole number 2 by the denominator 2. Whole number 2 equally 2 * 2/2 = 4/2b) showroom the answer from previous step 4 lớn the numerator 1. New numerator is 4 + 1 = 5c) Write a previous answer (new numerator 5) over the denominator 2.Two & one half is five halfs
Rules for expressions with fractions: Fractions - use a forward slash to divide the numerator by the denominator, i.e., for five-hundredths, enter 5/100. If you use mixed numbers, leave a space between the whole & fraction parts.Mixed numerals (mixed numbers or fractions) keep one space between the integer andfraction và use a forward slash to đầu vào fractions i.e., 12/3 . An example of a negative mixed fraction: -5 1/2.Because slash is both signs for fraction line và division, use a colon (:) as the operator of division fractions i.e., 1/2 : 1/3.Decimals (decimal numbers) enter with a decimal point . và they are automatically converted to fractions - i.e. 1.45.
Math Symbols
| + | plus sign | addition | 50% + 1/3 |
| - | minus sign | subtraction | 1 1/2 - 2/3 |
| * | asterisk | multiplication | 2/3 * 3/4 |
| × | times sign | multiplication | 2/3 × 5/6 |
| : | division sign | division | 1/2 : 3 |
| / | division slash | division | 1/3 / 5 |
| : | colon | complex fraction | 1/2 : 1/3 |
| ^ | caret | exponentiation / power | 1/4^3 |
| () | parentheses | calculate expression inside first | -3/5 - (-1/4) |
Examples: • adding fractions: 2/4 + 3/4• subtracting fractions: 2/3 - 1/2• multiplying fractions: 7/8 * 3/9• dividing Fractions: 1/2 : 3/4• reciprocal of a fraction: 1 : 3/4• square of a fraction: 2/3^2• cube of a fraction: 2/3^3• exponentiation of a fraction: 1/2^4• fractional exponents: 16 ^ 1/2• adding fractions và mixed numbers: 8/5 + 6 2/7• dividing integer and fraction: 5 ÷ 1/2• complex fractions: 5/8 : 2 2/3• decimal to fraction: 0.625• Fraction to lớn Decimal: 1/4• Fraction khổng lồ Percent: 1/8 %• comparing fractions: 1/4 2/3• multiplying a fraction by a whole number: 6 * 3/4• square root of a fraction: sqrt(1/16)• reducing or simplifying the fraction (simplification) - dividing the numerator và denominator of a fraction by the same non-zero number - equivalent fraction: 4/22• expression with brackets: 1/3 * (1/2 - 3 3/8)• compound fraction: 3 phần tư of 5/7• fractions multiple: 2/3 of 3/5• divide khổng lồ find the quotient: 3/5 ÷ 2/3
The calculator follows well-known rules for the order of operations. The most common mnemonics for remembering this order of operations are: PEMDAS - Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. BEDMAS - Brackets, Exponents, Division, Multiplication, Addition, Subtraction BODMAS - Brackets, Of or Order, Division, Multiplication, Addition, Subtraction. GEMDAS - Grouping Symbols - brackets (), Exponents, Multiplication, Division, Addition, Subtraction.
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MDAS - Multiplication and Division have the same precedence over Addition and Subtraction. The MDAS rule is the order of operations part of the PEMDAS rule. Be careful; always do multiplication và division before addition & subtraction. Some operators (+ and -) và (* và /) has the same priority và then must evaluate from left to right.