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In this lesson, we will learn how to understand subtraction, subtract one- or two-digit integers, and apply this to real-life situations.

Q1:

Fill in the black in − 1 − 5 = .

Q2:

Fill in the black in − 1 − 6 = .

Q3:

Fill in the black in − 2 − 5 = .

Q4:

( − 1 − 2 ) − 7 = .

Q5:

During a yard sale, Anthony had two pairs of shoes that he expected to sell for the same price. One pair of shoes sold for $5 more than expected and the other sold for $2 less than expected. What was the difference between the selling prices?

Q6:

What is [ 3 6 − ( − 2 0 ) ] − ( − 4 + 3 ) ?

Q7:

What is 4 3 − ( − 7 ) − ( − 2 0 ) ?

Q8:

Among all of the pairs of numbers whose difference is 12, find the pair with the smallest product.

Q9:

The Mayan civilization is believed to have begun in 2600 BCE and collapsed in 900 CE. How long did the Mayan civilization last?

Q10:

Find the equation that answers this problem:

Today, Hannah is 37 years old and William is 61 years old. How old was William 23 years ago?

Q11:

Complete the following to describe the relation between addition and subtraction:

Q12:

What is the difference between the most yards gained and the most yards lost?

Q13:

Fill in the blank: 9 − 4 = .

Q14:

One day, the temperature started at − 8 ∘ F , dropped 2 ∘ F , and then rose 9 ∘ F by noon to reach the days maximum temperature. The next day, the temperature started at − 1 4 ∘ F , rose 5 ∘ F , and then again rose another 4 ∘ F by noon to reach the days maximum temperature. Find the difference between the highest temperatures on those two days.

Q15:

6 − 5 =

Q16:

8 − 7 =

Q17:

4 − 3 =

Q18:

Noah’s golf score was 4 strokes less than Daniel’s golf score, which was 4 strokes more than William’s. If William’s score relative to par was + 9 , what was Noah’s golf score?

Q19:

A shipwreck is 39 feet below sea level. A scuba diver is 16 feet closer to the surface. Express the position of the scuba diver in relation to the surface as an integer.

Q20:

Calculate the following: − 2 0 − ( − 4 ) .

Q21:

The First Messenian War was one between Messenia and Sparta in Ancient Greece. It began in 743 BCE and ended in 724 BCE. How long did the First Messenian War last?

Q22:

The freezing point of bromine is − 7 ∘ C , while the freezing point of methane is − 1 8 2 ∘ C . How much warmer is bromine’s freezing point than methane’s?

Q23:

A store had 67 cans of soft drinks. If 55 of them were sold, how many cans are left?

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