The metric system is commonly used to measure the length, weight or volume of an object. Length is measured in millimetres (mm), centimetres (cm), metres (m) or kilometres (km). Examples are 1 cm = 10 mm, 1 m = 100 cm, 1 km = 1000 m, 1 cm is about the width of a staple, 1 m is about the width of a single bed.

Another important source of metrics in differential geometry are metric tensors, bilinear forms that may be defined from the tangent vectors of a differentiable manifold onto a scalar. A metric tensor allows distances along curves to be determined through integration, and thus determines a metric. However, not every metric comes from a metric tensor in this way.

Most adults still regard mathematics as their most difficult subject from when they were in school. I still get nightmares of math tests dealing with length conversion subjects or the metric conversion calculator. Whether we like it or not, math is an important part of our lives and our kids must learn at least the basics and fundamentals. If you are trying to get your child to enjoy studying mathematics like the metric conversion table, a great place to get started is by making it more fun and understandable.

Getting a child to sit down and do their math homework can be quite the challenge. What kid would choose to do their homework on weight conversion and metric measurements instead of playing outside? One way to make it less stressful is by adding some fun to it. Math games help kids get over their fear of math and properly understand certain topics related to it.

In math (mathematics), a metric or distance function is a function that defines a distance between each pair of elements of a set. A set with a metric is called a metric space. A metric induces a topology on a set, but not all topologies can be generated by a metric. A topological space whose topology can be also described by a metric is called metrizable.