Recognised as Decimal number

-1.9989

Negative
Decimal
4 d.p.
Exact fraction
5 s.f.

-1.9989 is a decimal number equal to -19,989⁄10,000. It lies between -2 and -1, and as a percentage it is -199.89%.

Number properties

Absolute value1.9989

SignNegative

Integer part-1

Fractional part0.9989

Decimal places4

Floor-2

Ceiling-1

Rounded to nearest-2

Truncated-1

Fractions & ratios

As a fraction-19,989/10,000exact

Ratio-19,989 : 10,000

As a percentage-199.89%

Reciprocal-0.5002751513≈

Arithmetic

Double-3.9978

Half-0.99945

Square3.995601

Cube-7.986807

Cube root-1.259690022≈

Negation1.9989

Representations

Decimal-1.9989

Scientific notation-1.9989 × 10^0

Exponential-1.9989e+0

IEEE 754 binary64 (hex)0xBFFFFB7E90FF9724the exact 64-bit pattern stored

IEEE 754 binary32 (hex)0xBFFFDBF532-bit single precision, may lose accuracy

Stored as-1.9989the nearest binary64 value to what you typed

Rounding & precision

Significant figures as written5counted from the digits as typed, not from the value

To 0 decimal places-2

To 1 decimal place-2.0

To 2 decimal places-2.00

To 3 decimal places-1.999

To 4 decimal places-1.9989

To 1 significant figure-2

To 2 significant figures-2.0

To 3 significant figures-2.00

To 4 significant figures-1.999

Keep nerding

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