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1.A 2.B 3.C 4.D Five Minute Check 1 A.–9 B.–1 C. 1 D.9 Find 4 – 5. (over Lesson 2-5) Find –14 – 34. A.–48 B. –20 C. 20 D.48 Find –45 – (–8). A.–53 B. –37 C. 37 D.53

Lesson Menu Main Idea Key Concept: Multiply Integers with Different Signs Example 1: Multiple Integers with Different Signs Example 2: Multiple Integers with Different Signs Key Concept: Multiply Integers with Same Sign Example 3: Multiply Integers with the Same Sign Example 4: Multiply Integers with the Same Sign Example 5: Multiply Integers with the Same Sign

Main Idea/Vocabulary Multiply integers (2.2.8B) (M8.A.3.3.1).

KC 1

Example 1 Multiply Integers with Different Signs Find 5(–4). Answer: –20 5(–4)=–20The integers have different signs. The product is negative.

1.A 2.B 3.C 4.D Example 1 A.–15 B.–2 C.2 D.15 Find 3(–5).

Example 2 Multiply Integers with Different Signs Find –3(9). Answer: –27 –3(9)=–27The integers have different signs. The product is negative.

1.A 2.B 3.C 4.D Example 2 A.–35 B.2 C.12 D.35 Find –5(7).

KC 2

Example 3 Multiply Integers with the Same Sign Find –6(–8). Answer: 48 –6(–8)=48The integers have the same sign. The product is positive.

1.A 2.B 3.C 4.D Example 3 A.–28 B.–11 C.11 D.28 Find –4(–7).

Example 4 Find (–8) 2. Answer: 64 Multiply Integers with the Same Sign (–8) 2 =(–8)(–8)There are two factors of –8. =64The product is positive.

1.A 2.B 3.C 4.D Example 4 A.–25 B.–10 C.10 D.25 Find (–5) 2.

Example 5 Find –2(–5)(–6). Answer: –60 Multiply Integers with the Same Sign –2(–5)(–6)=[–2(–5)](–6)Associative Property = 10(–6)–2(–5) = 10 =–60The product is negative.

1.A 2.B 3.C 4.D 5.D Example 5 A.84 B.–14 C.14 D.–84 Find –7(–3)(–4).

Review REVIEW Multiply. 1.6(-10) 2.11(-4) 3.-2(14) 4.-8(5) 5.-15(-3) 6.-7(-9) 7.(-8) 8.(-3) 9.-1(-3)(-4) 10. 2(4)(5)

End of the Lesson

Resources Five-Minute Check (over Lesson 2–5) Image Bank Math Tools Adding Integers Comparing and Ordering Integers Subtracting Positive and Negative Integers

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