Quiz 4 | Math 10/2 quiz

20 questions · Typed answersNot submitted

Show your work vertically on paper, then type your answers. All questions are below. Some questions have more than one answer box; complete every box.

Use a minus sign for negatives. Enter fractions as 3/4 and mixed numbers as 2 1/3. A negative mixed number such as -2 1/3 means negative two and one third. Equivalent exact fractions and decimals are accepted. Do not round unless a question asks for an estimate.

One final submission. Drafts save in this browser. After grading, your answers lock and corrections appear. Each question is worth 1 point; all of its boxes must be correct. Grading checks typed responses, not paper working.

Evaluate. Type the exact answer.

−12.48 + 19.6

Your answer

First estimate by rounding EACH addend to the nearest whole number and adding those rounded numbers. Then find the exact sum. Do not round the exact answer.

−6 23 + (−1 18)

Estimate (nearest-whole-number addends)

Exact sum

Fraction: 3/4. Mixed number: 2 1/3. Negative mixed number: -2 1/3.

Model this sum on the horizontal number line. Start at 0. Type the coordinate of the first stop after the first addend, then the final stop after the second addend.

−12 + 17

First stop

Final stop (sum)

Evaluate. Type the exact answer.

7 18 − 2 512

Your answer

Fraction: 3/4. Mixed number: 2 1/3. Negative mixed number: -2 1/3.

A student takes 17 steps backward. Backward is negative. What signed integer represents the opposite action? Fill in the blank so the two actions cancel.

−17 + ____ = 0

Opposite change

Evaluate. Type the exact answer.

31 + (−12) + (−31) + (−5) + 12

Your answer

What is the additive inverse of this number?

4.25

Additive inverse

Fraction: 3/4. Mixed number: 2 1/3. Negative mixed number: -2 1/3.

Evaluate. Type the exact answer.

4 23 + 1 79

Your answer

Fraction: 3/4. Mixed number: 2 1/3. Negative mixed number: -2 1/3.

Evaluate. Type the exact answer.

−49 + (−56)

Your answer

Fraction: 3/4. Mixed number: 2 1/3. Negative mixed number: -2 1/3.

Evaluate. Type the exact answer.

27 − (−16)

Your answer

Evaluate. Type the exact answer.

−6 15 + 8 710

Your answer

Fraction: 3/4. Mixed number: 2 1/3. Negative mixed number: -2 1/3.

Evaluate. Type the exact answer.

−46 + (−28)

Your answer

Evaluate. Type the exact answer.

14 + (−9) − 21

Your answer

Evaluate. Type the exact answer.

1318 − 14

Your answer

Fraction: 3/4. Mixed number: 2 1/3. Negative mixed number: -2 1/3.

An account starts at −$26.50. A deposit adds $18.75, then a withdrawal removes $6.40. Write an addition/subtraction expression showing the starting balance and both changes. What is the final balance? A balance below zero is negative.

Numerical expression (show all three amounts)

Show all three amounts. Use +, − and parentheses; do not type units.

Final balance (dollars)

Evaluate. Type the exact answer.

0.905 + 2.37

Your answer

Evaluate. Type the exact answer.

7.03 − 2.86

Your answer

Evaluate. Type the exact answer.

1112 + 415

Your answer

Fraction: 3/4. Mixed number: 2 1/3. Negative mixed number: -2 1/3.

Evaluate. Type the exact answer.

−91 + 126

Your answer

Without finding the exact sum, predict its sign. Type positive, zero, or negative.

−31.405 + 12.6

Sign of the sum

Type one word: positive, zero, or negative.

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