Topic explanation · Public Library

Read the topic explanation, then try Quiz or Practice to check understanding.

Classroom-style explanation with key points, examples, and study tools for each topic.

Number Lcds

Mathematics · Class 10

x/2 + x/5 = 7x/10. LCD 10. x-22 + x+109 uses LCD 18: 9(x-2)+2(x+10) all over 18 = 11x+1618.

LCM of bottoms
LCD from factors
then combine tops
keep the ideas separate
Number Lcds: x/2 + x/5 = 7x/10. LCD 10. x-22 + x+109 uses LCD 18: 9(x-2)+2(x+10) all over 18 = 11x+1618.
WHAT — NUMBER LCDS: x/2 + x/5 = 7x/10. LCD 10. x-22 + x+109 uses LCD 18: 9(x-2)+2(x+10) all over 18 = 11x+1618.
HOW — Use the idea: Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check
CORE UNDERSTANDING: x/2 + x/5 = 7x/10. LCD 10. x-22 + x+109 uses LCD 18: 9(x-2)+2(x+10) all over 18 = 11x+1618.

Right triangle — Number Lcds — original sketch for this lesson (not copied from a textbook).