Study Guide and Intervention (continued) - MathnMind
Study Guide and Intervention (continued) - MathnMind
Study Guide and Intervention (continued) - MathnMind
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2-3<br />
NAME ______________________________________________ DATE ____________ PERIOD _____<br />
<strong>Study</strong> <strong>Guide</strong> <strong>and</strong> <strong>Intervention</strong><br />
Multiplying Rational Numbers<br />
Multiply Integers You can use the rules below when multiplying integers <strong>and</strong> rational<br />
numbers.<br />
Multiplying Numbers with the Same Sign The product of two numbers having the same sign is positive.<br />
Multiplying Numbers with Different Signs The product of two numbers having different signs is negative.<br />
Example 1 Find each product. Example 2<br />
Simplify the expression<br />
a. 7(6)<br />
(2x)5y.<br />
The signs are different, so the product is (2x)5y (2)(5)x y Commutative Property ()<br />
negative.<br />
(2 5)xy Associative Property<br />
7(6) 42 b. 18(10)<br />
The signs are the same, so the product is<br />
positive.<br />
18(10) 180<br />
10xy Simplify.<br />
Exercises<br />
Find each product.<br />
1. 11(4) 2. 5(3) 3. (24)(2)<br />
4. (60)(3) 5. (2)(3)(4) 6. 8(15)<br />
7. 15(3) 8. (12)(10) 9. (22)(3)(2)<br />
10. (5)(5)(0)(4) 11. (15)(45) 12. (12)(23)<br />
Simplify each expression.<br />
13. 4(2x) 8x 14. 6(2n ) 10n 15. 6(3y y)<br />
16. 3(3d 2d) 17. 2x(2) 2x(3y) 18. 4m(2n) 2d(4e)<br />
19. 5(2x x) 3(xy) 20. (2)(4x 2x) 21. (3)(8n 6m)<br />
© Glencoe/McGraw-Hill 87 Glencoe Algebra 1<br />
Lesson 2-3
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