Temperature Changes and Proportionality

This video tutorial covers various math problems related to temperature changes, inequalities, addition expressions, proportional relationships, and percentage calculations. It provides step-by-step solutions and explanations for each problem, helping students understand concepts such as addition, subtraction, proportionality, and percentages in a practical context.

If the temperature is -2°C and it rises by 15°C, what is the new temperature?

• 15°C

• 13°C

• 12°C

• 10°C

At midnight, the temperature is -6°C, and at midday, it is 9°C. By how much did the temperature rise?

• 15°C

• 14°C

• 13°C

• 12°C

Which number is less than -3°C?

• -1°C

• 0°C

• -2°C

• -4°C

Find a temperature greater than -0.8°C and less than -0.1°C.

• -0.9°C

• -0.5°C

• -0.2°C

• 0°C

What is the addition expression for a temperature that was 80°F and then fell 20°F?

• 80 + 20

• 80 - 20

• 80 - (-20)

• 80 + (-20)

If a temperature was -13°F and rose by 9°F, what is the addition expression?

• -13 + 9

• -13 - 9

• 13 + 9

• 13 - 9

What is the constant of proportionality for the number of wheels on a group of buses?

• 7

• 8

• 5

• 6

Is the number of wheels on a train proportional to the number of train cars?

• Yes, it is proportional

• Only sometimes

• No, it is not proportional

• It depends on the train

Noah was supposed to make 64 cookies but made 125% of that amount. How many cookies did he make?

• 90

• 80

• 72

• 64

If 90% of Noah's cookies were sold, how many were left?

• 6

• 12

• 8

• 10