Interactive multiple-choice quiz: اختبار الوحدة الثالثة الرياضيات - ريفيل
اختبار مراجعة شامل للوحدة الثالثة في مادة الرياضيات للصف السابع. يتضمن الاختبار تمارين على العمليات الحسابية للأعداد الصحيحة ومسائل حياتية. الفصل الدراسي الأول للعام 2026 - 2027.
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اختبار شهادة تدريبي مؤقت للصف والمادة والفصل نفسه.
اختر إجابة واحدة لكل سؤال. عند الاختيار ستظهر النتيجة فورًا: الأخضر صحيح، والأحمر خطأ، وسيظهر تفسير الإجابة مباشرة إن كان متوفرًا. وبعد آخر سؤال ستظهر الدرجة النهائية تلقائيًا.
Lucy's dog lost 6 pounds. How much weight does her dog need to gain in order to have a net change of 0 pounds?
Explanation
A loss of 6 pounds is represented by -6. To reach a net change of 0, the dog must gain 6 pounds (+6), because -6 + 6 = 0.
Question 3
3
Points: 1
The table shows the transactions for one week for Tasha and Jamal. Who has the greater account balance at the end of the week? How much greater?
Explanation
Tasha: 250 - 20 + 65 - 46 = 249. Jamal: 200 - 60 + 135 - 27 = 248. Tasha has 249 - 248 = 1 dollar more.
Question 4
4
Points: 1
Solve the following exercise: 13 - (-63)
Explanation
Subtracting a negative is the same as adding a positive: 13 + 63 = 76.
Question 5
5
Points: 1
Find the distance between -6 and 7 on a number line.
Explanation
The distance is the absolute value of the difference: $|7 - (-6)| = |7 + 6| = 13$.
Question 6
6
Points: 1
The table shows the record high and record low temperatures for certain U.S. states. Which state in the list had the greatest variation in temperature? the least?
Explanation
Variation = High - Low. Alaska: 100 - (-80) = 180; Idaho: 118 - (-60) = 178; Nevada: 125 - (-50) = 175; Utah: 117 - (-69) = 186. Greatest is Utah (186), Least is Nevada (175).
Question 7
7
Points: 1
Solve the following exercise: 7(-5)(4)
Explanation
7 × -5 = -35, and -35 × 4 = -140.
Question 8
8
Points: 1
Evaluate ab if a = -16 and b = -5
Explanation
The product of two negative numbers is positive: -16 × -5 = 80.
Question 9
9
Points: 1
Payton starts a lemonade stand for the summer. She thinks that she should be able to operate her business for 14 weeks. The table shows the expenses and revenue after 1 week. Based on this, how much money will Payton make during the 14 weeks?
Dividing a negative number by another negative number result in a positive number: -39 / -13 = 3.
Question 11
11
Points: 1
A submarine descends to a depth of 660 feet below the surface in 11 minutes. At this rate, what integer represents the change, in feet, of the submarine's position after one minute?
Explanation
A descent of 660 feet is represented by -660. The rate per minute is -660 / 11 = -60.
Question 12
12
Points: 1
Nick had 100 in his savings account. Over the next 6 months, he worked at a seasonal store, where each month he earned400 and spent 250. He put the remaining amount in his savings account each month. Now that the job is over, he plans to spend200 per month. For how many months can he make withdrawals from his savings account until his balance is $0?
Explanation
Monthly savings = 400 - 250 = 150. Total after 6 months = 100 + (150 × 6) = 1000. Withdrawals of 200 per month =1000 / 200 = 5$ months.
Question 13
13
Points: 1
Solve the following exercise: $2(\frac{-80}{4}) - 14$
Five years ago the population at Liberty Middle School was 1,600 students. This year the population is 1,250 students. Use the expression $\frac{N-P}{5}$ where N represents this year's population and where P represents the previous population to find the average change in population each year.
Explanation
Substitute the values: $\frac{1250 - 1600}{5} = \frac{-350}{5} = -70$.
Question 15
15
Points: 1
The table shows the yearly initial and ending balance for each sibling in a family. Use the expression $\frac{I-E}{12}$ where I represents the initial balance and where E represents the ending balance, to find the average difference each month. Which sibling had the greatest monthly change?
Explanation
Alma: (226 - (-50))/12 = 23. Laurel: (200 - (-64))/12 = 22. Wes: (290 - 2)/12 = 24. Wes had the greatest change (24 units per month).
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