Lesson Master 3-8B

Name3-8BLesson MasterQuestions on SPUR ObjectivesSee Student Edition pages 201–205 for objectives.SKILLS Objective DIn 1–6, find the least common multiple of the given numbers.1. 2 and 102. 10 and 153. 8 and 124. 11 and 75. 5, 9, and 126. 10, 20, and 57. Use the fractions 2 __3 and 5 __9 .a. Name two possible common denominators forthe fractions.b. Rewrite the pair of fractions twice, using each of youranswers from Part a as the common denominator.8. Use the fractions 4 __7and 1 __4 .a. Name two possible common denominators forthe fractions.b. Rewrite the pair of fractions twice, using each of youranswers from Part a as the common denominator.In 9–20, find the sum and write it in simplest fractional form.9. 1 __ x + 1 __ x 10. 1 __7+ 2 __7+ 4 __711. __ 110 + ___ 3110013. __ 5 6 + – __ 5 2 + __ 5 615. 1 __5+ 9 __10 + – 1 __212. 2 __3 + – 3 __214. 3 __4 + – 7 __816. –0.75 + 3 __417. 3 __t+ – 1 __t+ - 6 __t18. 0.3 + 7 __1019.__ 2 3 + – __ 1 6 + – __ 1 220. –0.5 + 6 __25Copyright © Wright Group/McGraw-Hill202 Pre-Transition Mathematics

Name3-8Bpage 221. Consider the addition 1 __ x + 2 __ x + 4 __ x .a. Find the sum.b. For what value of x is the expression equal to 1?c. Find a value of x for which the expression is less than 1.d. Find a value of x for which the expression is greaterthan 1.In 22 and 23, find the perimeter.22.15 in.853 in.1653 in.1615 in.823.37 in.42 in.111618 in.8REVIEW Lesson 3-7, Objective G24. Two angles of a triangle measure 45° and 75°. Use theTriangle-Sum Theorem to find the measure of thethird angle.Copyright © Wright Group/McGraw-Hill25. True or False A quadrilateral can have threeangles with measures greater than 90°.26. True or False If two angles of a triangle have measuresless than 90°, then the third angle must be obtuse.Pre-Transition Mathematics 203