Add Integers on a Number Line Find 3 + 4. Start at zero. Answer: 3 + 4 = 7 Move three units to the right. From there, move four more units to the right.

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Add Integers on a Number Line Find Start at zero. Answer: = 7 Move three units to the right. From there, move four more units to the right.

A.A B.B C.C D.D A.7 B.–7 C.3 D.–3 Find –2 + –5.

Add Integers with the Same Sign Find –5 + (–4). –5 + (–4) = –9Add |–5| and |–4|. Both numbers are negative, so the sum is negative. Answer: –9

A.5 B.–5 C.11 D.–11 Find –3 + –8.

Add Integers on a Number Line A. Find 7 + (–11). Start at zero. Answer: 7 + (–11) = –4 Move 7 units to the right. From there, move 11 units to the left.

Add Integers on a Number Line B. Find – Start at zero. Answer: –2 + 9 = 7 Move 2 units to the left. From there, move 9 units to the right.

1.A 2.B 3.C 4.D A.13 B.–13 C.3 D.–3 A. Find –5 + 8.

A.3 B.–3 C.9 D.–9 B. Find 3 + (–6).

A. Find – Answer: 1 Add Integers with Different Signs B. Find 8 + (–15). Answer: –7

A.5 B.–5 C.17 D.–17 A. Find –

A.11 B.–11 C.3 D.–3 B. Find 4 + (–7).

WEATHER On February 1, the temperature at dawn was –22°F. By noon, it had risen 19 degrees. What was the temperature at noon? – = xTo find the sum, subtract |19| from |–22|. –3 = xThe sum is negative because |–22| > |19|. Answer: The temperature at noon was –3°F.

A.A B.B C.C D.D A.3 feet above sea level B.3 feet below sea level C.61 feet above sea level D.61 feet below sea level HIKING Dave started his hike at 32 feet below sea level. During the hike he gained an altitude of 29 feet. At what altitude did Dave complete his hike?

Add Three or More Integers A. Find –8 + (–4) + 8. –8 + (–4) + 8=– (–4)Commutative Property =0 + (–4)Additive Inverse Property =–4Identity Property of Addition Answer: –4

Add Three or More Integers B. Find 6 + (–3) + (–9) (–3) + (–9) + 2 = (–3) + (–9) Commutative Property = [6 + 2] + [–3 + (–9)]Associative Property = 8 + (–12) or –4Simplify. Answer: –4

A.–9 B.–3 C.3 D.15 A. Find 3 + (–9) + (–3).

A.–22 B.–8 C.0 D.10 B. Find – (–4) + 5.

Subtract a Positive Integer A. Find 9 – – 14= 9 + (–14)To subtract 14, add –14. = –5Simplify. Answer: –5

Subtract a Positive Integer B. Find –10 – 8. –10 – 8= –10 + (–8)To subtract 8, add –8. = –18Simplify. Answer: –18

A.A B.B C.C D.D A.2 B.–2 C.–3 D.14 A. Find 6 – 8.

A.A B.B C.C D.D A.–22 B.–4 C.4 D.22 B. Find –9 – 13.

Subtract a Negative Integer A. Find 15 – (–4). 15 – (–4)= To subtract –4, add 4. = 19Simplify. Answer: 19

Subtract a Negative Integer B. Find –11 – (–7). –11 – (–7)= –11 + 7To subtract –7, add 7. = –4Simplify. Answer: –4

1.A 2.B 3.C 4.D A.6 B.10 C.–6 D.16 A. Find 8 – (–2).

1.A 2.B 3.C 4.D A.17 B.7 C.–17 D.–7 B. Find –12 – (–5).

WEATHER The table shows the record high and low temperatures recorded in selected states. What is the range of temperatures for West Virginia? Answer: The range for West Virginia is 149°F. Solve112 – (–37)= To subtract –37, add 37. = 149Add 112 and 37.

1.A 2.B 3.C 4.D A.75ºF B.70ºF C.166ºF D.149ºF WEATHER The table shows the record high and low temperatures recorded in selected states. What is the range for Washington?

A. Evaluate m – (–2) if m = 4. m – (–2)=4 – (–2) Write the expression. Replace m with 4. =4 + 2To subtract –2, add 2. =6Add 4 and 2. Answer: 6 Evaluate Algebraic Expressions

B. Evaluate x – y if x = –14 and y = –2. Answer: –12 Evaluate Algebraic Expressions x – y=–14 – (–2) Write the expression. Replace x with –14 and y with –2. =–14 + 2To subtract –2, add 2. =–12Add –14 and 2.

A.A B.B C.C D.D A.10 B.–2 C.2 D.–10 A. Evaluate p – (–6) if p = –4.

A.A B.B C.C D.D A.–12 B.–6 C.6 D.–27 B. Evaluate m – n if m = –9 and n = –3.