Examples with solutions for Subtraction: Worded problems

Exercise #1

Here is a price list of products at a grocery store:

MilkWaterRiceFlourSugarSalt61371032How much money does Danny need to buy flour and water at the grocery store?

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the cost of each item Danny wants to buy.
  • Step 2: Sum the costs to find the total amount of money needed.

Now, let's work through each step:
Step 1: From the price list, the cost of Flour is 10 10 and the cost of Water is 13 13 .
Step 2: To find the total cost, add the cost of flour and water:
Total Cost = 10+13=23 10 + 13 = 23 .

Therefore, the total amount of money Danny needs to buy flour and water is 23 23 .

Answer

23 23

Exercise #2

Here is a price list of products at the neighborhood grocery store:

MilkBreadRiceFlourSugarSalt697432Ron has 56 shekels. If he buys some flour, then how much money will he have left?

Step-by-Step Solution

To solve this problem, we need to determine how much money Ron will have after purchasing the flour.

  • Step 1: Identify the initial amount of money Ron has, which is 56 56 shekels.
  • Step 2: Identify the cost of flour from the price list, which is 4 4 shekels.
  • Step 3: Subtract the cost of the flour from the initial amount of money to find the remaining balance.

Let's perform the calculation:
Remaining money = Initial amount - Cost of flour.
564=52 56 - 4 = 52

This indicates that after buying the flour, Ron will have 52 52 shekels remaining.

Therefore, the solution to the problem is 52 52 .

Answer

52 52

Exercise #3

Here is a price list of products at the grocery store:

MilkBreadRiceFlourSugarSalt697432Dana has 49 shekels. She buys some rice. How much money does she have left?

Step-by-Step Solution

To solve the problem, let's follow these steps:

  • Step 1: Identify the given amounts
  • Step 2: Perform subtraction to find out how much money is left

Step 1: Dana initially has 49 shekels. The cost of the rice she wants to buy is 7 shekels.

Step 2: To find out how much money Dana will have left after buying the rice, we subtract the cost of rice from her initial money:

497=42 49 - 7 = 42

This calculation shows that Dana will have 42 shekels remaining after purchasing the rice. Therefore, the solution is:

42 42 .

Answer

42 42

Exercise #4

Here is a price list of products at the neighborhood grocery store:

MilkBreadRiceFlourSugarSalt697432David has 49 shekels. He buys some bread at the store. How much money does he have left?

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Identify the given information: David starts with 49 shekels.
  • Determine the cost of the bread: It costs 9 shekels.
  • Use subtraction to find the remaining money.

Now, let's work through each step:
Step 1: David has 49 shekels initially.
Step 2: The price of the bread is 9 shekels.
Step 3: Subtract the cost of the bread from the total money.

Remaining Money=499 \text{Remaining Money} = 49 - 9

Calculating, we get:

Remaining Money=40 \text{Remaining Money} = 40 .

Therefore, after purchasing bread, David has 40 40 shekels left.

Answer

40 40

Exercise #5

Maya has 20 bracelets and Rachel has 17 bracelets. They decide to collectively give 7 bracelets to their friend Danielle. How many do they have left?

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the total number of bracelets they start with.
  • Step 2: Subtract the number of bracelets given away.

Now, let's work through these steps:

Step 1: Initially, Maya has 20 bracelets and Rachel has 17 bracelets.
We add these two numbers to find the total number of bracelets they have together:

20+17=37 20 + 17 = 37

Step 2: They decide to give 7 bracelets to Danielle.
To find out how many bracelets they have left, we subtract the number of bracelets given to Danielle from the initial total:

377=30 37 - 7 = 30

Therefore, Maya and Rachel together have 30\mathbf{30} bracelets remaining after giving away 7 bracelets to Danielle.

Answer

30 30

Exercise #6

Maya has 20 bracelets and Rachel has 17 bracelets. They decide to give some of their bracelets to their friend Danielle. If they still have 30 bracelets collectively, how many bracelets did they give to Danielle?

Step-by-Step Solution

To solve this problem, follow these steps:

  • Step 1: Calculate the original number of bracelets that Maya and Rachel have together. Maya has 20 bracelets, and Rachel has 17, so initially, they have 20+17=37 20 + 17 = 37 bracelets.
  • Step 2: Determine how many bracelets they have after giving some to Danielle. Together, they now have 30 bracelets.
  • Step 3: Calculate the number of bracelets given to Danielle by finding the difference between the original total and the current total. This is given by 3730 37 - 30 .

Now, let's compute:

Initially, Maya and Rachel collectively had 37 37 bracelets. After giving some to Danielle, they have 30 30 bracelets. Therefore, the number of bracelets they gave to Danielle is 3730=7 37 - 30 = 7 .

The correct answer is 7\mathbf{7} bracelets.

Thus, the correct choice from the provided options is Choice 4: 7 7 .

Answer

7 7

Exercise #7

Jonathan has 15 pencils and Daniel has 17 pencils.

They decide to give 2 pencils each to their friend Betty.

How many pencils do Jonathan and Daniel have left altogether?

Step-by-Step Solution

To solve this problem, we'll address each part step-by-step and verify at each stage:

  • Step 1: Determine how many pencils Jonathan has after giving away pencils.
  • Step 2: Determine how many pencils Daniel has after giving away pencils.
  • Step 3: Add the remaining pencils of Jonathan and Daniel to find out how many they collectively have left.

Let's proceed through the steps:

Step 1: Jonathan has 15 pencils originally. He gives 2 pencils to Betty. Therefore, his remaining number of pencils is: 152=13 15 - 2 = 13

Step 2: Daniel has 17 pencils originally. He gives 2 pencils to Betty. Therefore, his remaining number of pencils is: 172=15 17 - 2 = 15

Step 3: To find the total number of pencils Jonathan and Daniel have left, we add their remaining pencils together: 13+15=28 13 + 15 = 28

Therefore, Jonathan and Daniel have altogether 28 28 pencils left.

Answer

30 30