Urethane vs. Plastic. We often hear the question âIs urethane plastic?â and the answer is no. Urethane has many benefits that plastic does not! With plastics, the higher the durometer, the more likely a part is to crack and break under impact and shock loading. Not so with urethane. Urethane is not brittle like plastic. Itâs a true elastomer capable of tremendous impact resistance even at very high durometers.
Third Grade Math Vocabulary 1. Compatible numbers-numbers that are easy to work with mentally 22 + 73 = 25 + 70 The numbers 25 and 70 are compatible numbers for estimating the sum of 22 and 73. 2. Estimate-a number close to an exact amount Three-hundred is an estimate of 276.
Equality (mathematics) In mathematics, equality is a relationship between two quantities or, more generally two mathematical expressions, asserting that the quantities have the same value, or that the expressions represent the same mathematical object. The equality between A and B is written A = B, and pronounced A equals B. The symbol = is called an equals sign.