Floating point arithmetic is rarely exact.

浮点运算很少是精确的。

youdao

Many of the familiar algebraic rules for real number arithmetic do not always hold for floating-point arithmetic.

对于浮点算法而言，许多惯用的实数算法代数规则有时并不适用。

youdao

Even under version 7.2, Vim does only floating-point arithmetic if one of the operands is explicitly floating-point.

即使对于版本7.2，如果其中一个运算对象被明确声明为浮点类型，那么Vim只支持浮点算术。

youdao

My point is that his clever arithmetic, even if his fingers were crossed behind his back, can do real damage to his less sophisticated audience.

FORBES: Million Dollar Jobs

This may or may not actually be true but what I want to point to is the seeming ignorance even of basic arithmetic that the piece reveals.

FORBES: Can Robert Reich Actually Do Arithmetic? Apologies, But Yes This Is A Serious Question

And while computers were ideal for streamlining tedious dice rolls and arithmetic, those, for him, were never the point.

ECONOMIST: Gary Gygax