Evaluate Multiplication and Division Expressions

SWBAT find the value of algebraic expressions involving

multiplication or division

Review

What does it mean to evaluate? Substitute the given number for the variable. Solve or compute to find the value.

Examples

Gilbert drives a train at an average rate of 130 hours per hour. After a number of hours the train reaches its destination. How many miles does the train travel in 2.5 hours?

Set up as an expression with a variable: 130x

Evaluate for the given value: 130(2.5) 325

Examples

33t, for t = 1.3345 ÷ f, for f = 15How do I calculate 0.25 · 8 ÷ 2?0.5r, for r = 60004.2n, for n = 20n ÷ 160, for n = 2992a(2.1x0.02), for a = 40