To multiply a decimal by a decimal: Rewrite each decimal as a whole number divided by a power of 10 close powers of 10 The second power of 10 for example is 100. Powers of 10 are 10, 100, 1000 and ...

Teach your children 4th grade math skills like fractions, multiplication and division. ... (using decimal notation – for example: .25, .05, $2.35) units of mass (grams, kilograms) ...

The 2,300-year-old matrix is the world's oldest decimal multiplication table. From a few fragments out of a collection of 23-century-old bamboo strips, historians have pieced together what they ...