Subtracting Integers in Word Problems

This video tutorial covers subtracting integers through word problems. It begins with an introduction to integers and zero pairs, explaining how to add the opposite when subtracting. The video then presents three word problems: calculating elevation change, finding temperature differences, and determining gas temperature change. Each problem is solved step-by-step, emphasizing the concept of adding the opposite and using absolute values to determine the sign of the result.

What are integers?

• Whole numbers and their opposites

• Fractions and decimals

• Only positive numbers

• Only negative numbers

What is the result of adding a negative number and its positive counterpart?

• A positive number

• A negative number

• Zero

• A fraction

Tags

CCSS.7.NS.A.1C

Emma started her hike at -225 ft and ended at -127 ft. What was the change in elevation?

• 127 ft

• 225 ft

• 352 ft

• 98 ft

Tags

CCSS.7.NS.A.1C

When subtracting integers, what operation do we perform instead?

• Add the same number

• Add the opposite

• Subtract the opposite

• Multiply by -1

Tags

CCSS.7.NS.A.1C

The record high temperature in Austin, Texas is 90°F and the record low is -2°F. What is the difference between these temperatures?

• 92°F

• 90°F

• 94°F

• 88°F

Tags

CCSS.7.NS.A.1C

What is the first step in solving a subtraction problem involving integers?

• Subtract the numbers directly

• Divide the numbers

• Multiply the numbers

• Add the opposite of the second number

Tags

CCSS.7.NS.A.1C

A scientist recorded a temperature change from -21°C to 8°C. What is the difference in temperature?

• 13°C

• 8°C

• 29°C

• 21°C

Tags

CCSS.7.NS.A.1C

When adding integers with different signs, what do you do?

• Multiply the absolute values

• Divide the absolute values

• Subtract the absolute values

• Add the absolute values

Tags

CCSS.7.NS.A.1C

Which integer's sign do you use when the absolute values are different?

• Always positive

• Always negative

• The integer with the larger absolute value

• The integer with the smaller absolute value

Tags

CCSS.7.NS.A.1C

What is the term for the result of a subtraction problem?

• Sum

• Product

• Quotient

• Difference

Tags

CCSS.6.NS.B.3