Fraction Bars
Fraction Bars are a type of mathematical manipulative, developed in the sixties by Albert B. Bennett, Jr. They provide visual illustrations of mathematical operations with fractions to gain better understanding of these operations.
Fraction Bars
英语百科
- Toxic effect of food contaminant的意思
- Toxic effect of freon的意思
- Toxic effect of fusel oil的意思
- Toxic effect of gasoline的意思
- Toxic effect of grain alcohol的意思
- Toxic effect of heavy metal的意思
- Toxic effect of hydrocarbon gas的意思
- Toxic effect of hydrochloric acid的意思
- Toxic effect of hydrocyanic acid的意思
- Toxic effect of hydrocyanic acid gas的意思
- Toxic effect of inorganic lead compound的意思
- Toxic effect of iron compound的意思
- Toxic effect of isopropanol的意思
- Toxic effect of isopropyl alcohol的意思
- Toxic effect of kerosine的意思
- Toxic effect of lacrimogenic gas的意思
- Toxic effect of lead acetate的意思
- Toxic effect of lead compound的意思
- Toxic effect of lead dioxide的意思
- Toxic effect of lead salt的意思
- Toxic effect of liquefied petroleum gas的意思
- Toxic effect of lye的意思
- Toxic effect of malathion的意思
- Toxic effect of manganese and its compounds的意思
- Toxic effect of mercury and its compounds的意思