7th Grade 1st Semester Exam

The diagram shows a bar marked with units. By measuring the length indicated, we find it measures exactly 4 units, confirming that the correct answer is 4 units.

The diagram shows a bar marked with measurements. By counting the units, we find that the length of the bar is 7 units, making this the correct answer.

To find the combined length, add the two measurements. If the measurements are 4 units and 4 units, their sum is 8 units, which matches the correct answer. Therefore, the length of the two combined measurements is 8 units.

The temperature increases by 4° each hour for 5 hours, so the total change is represented by the equation (+4) x (+5). This indicates a positive change in temperature over a positive duration.

The glacier melted 3m per day for 6 days, totaling 3m x 6 = 18m. Since the glacier is melting, this change is negative, resulting in a total change of -18m. Thus, the correct answer is (-18).

To find the product of (+20) and (+13), multiply the two positive numbers: 20 x 13 = 260. Therefore, the correct answer is (+260).

To solve -20 ÷ +5, divide -20 by 5. The result is -4, since dividing a negative number by a positive number yields a negative result. Thus, the correct answer is (-4).

To evaluate (-6) + 4(-2), first calculate 4(-2) = -8. Then, add -6 + (-8) = -14. Thus, the correct answer is (-14).

To find the missing integer, multiply both sides by -7: [ ] = (-7) * (-7). This gives [ ] = 49. Therefore, the correct integer is +49.

Kyle's debt is represented as -5 for each friend. Since he owes 3 friends, the expression (-5) x (+3) = -15 correctly shows his total debt of -15.