It is interesting to note that despite these regional differences, many of the basic

units of length during these earlier times were very similar throughout most of the world.

Measurements are available in both standard and meter systems making this an excellent tool for mathematics activities that involve using both

units of length. This tool is also effective for a practical exploration of simple and scientific notation.

The results are plotted in Figure 3 and highlight the number of cracks for all 16

units of length. Figure 3 shows that the number of cracks on the entire length of zinc layer that encloses each unit is overall scattered; however, on the local case of two/three consecutive units, the number of cracks per unit seems to be almost uniformly distributed.

Using a linear model relies upon comparing

units of length, using an area model relies upon comparing units of area and using a discrete model of fractions relies upon comparing abstract units composed of other units (abstract composite units).

Using healthcare situations for illustration, they describe the number system; addition, subtraction, multiplication, and division skills;

units of length, liquid volume, and weight; using a calculator; rounding; calculations with decimals; imperial units still in use; fractions and ratios; proportionality and "per"; percentages; miscellaneous math; and applications to areas such as dosages, fluid requirements for children, growth charts, and molar concentrations and chemical formulas.

Primary school children commonly use 30-centimetre and one-metre rulers as tools to apply the use of standard or formal

units of length.

Table 2: Correspondence of metric and Imperial

units of length and area.

where are: [q.sub.c+c+r]--heat flow which loses in the environment with conduction, convection and radiation, [q.sub.L,c+c+r]--Heat flow, in

units of length, which loses in the environment with conduction, convection and radiation, [([E.sub.[tau]).sub.1]--the thermal energy flow in the entrance of the conveyor tube, [([E.sub.[tau]).sub.2]--the thermal energy flow in the exit of the conveyor tube, From equation (2) determined the gases temperature at the exit of conveyor tube, according to equation:

The answer is that, although the operations yield analogous results, subtracting two horses from four horses is not the same thing as subtracting two

units of length from four

units of length.

Moreover, he is able to introduce natural

units of length, mass, time, and temperature [4; [section]164].

He talks about Bohr

units of length and time Plank's cavity radiancy Einstein's quantum energies and more.