ADDITION AND SUBTRACTION WORD PROBLEMS

Problem 1 :

There were  25 pencils and 36 pens. How many more pens  are there than pencils?

Solution :

36 - 25 = 11

There were 11 more pens than than pencils.

Problem 2 :

Mr. James said that there should be 15 rugby balls in the store room. But, Justin found only 11 rugby balls in the storeroom. How many rugby balls were missing?

Solution :

15 - 11 = 4

4 rugby balls were missing.

Problem 3 :

The sum of two numbers is 475, if one of the numbers is 225, find the other number.

Solution :

475 - 225 = 250

The other number is 250.

Problem 4 :

There are 4 small whiteboards and 7 boxes of markers for coaches to use. But, it is required a total of 10 whiteboards and 12 boxes of markers. How many more whiteboards and boxes of markers are needed?

Solution :

10 – 4 = 6

There are 6 more whiteboards needed.

12 – 7 = 5

There are 5 more boxes of markers needed.

Problem 5 :

Write the number sentence that fits this :

“Steve Justin found 17 hockey sticks, but 3 of them were broken and another 5 needed repairing. There were only 9 hockey sticks that could be used.”

Solution :

17 – 3 – 5 = 9

Problem 6 :

Lily had $100. Lily's father gave her $200. With this money, she spent $150 for dresses and gave $120 for her friend. How much money did Lily have left?

Solution :

100 + 200 - 150 - 120 = 30

Lily had left $30.

Problem 7 :

There are 1500 books in a library in which 1100 books are in English, 120 books are in French and the rest are in Spanish. Find the number of books in Spanish.

Solution :

1500 - 1100 - 120 = 280

There are 280 Spanish books in the Library.

Problem 8 :

Daniel had $500. He kept $200 for himself. In the remaining, he gave $80 to his friend and donated the rest to a charity. How much money did Daniel donate to the charity?

Solution :

500 - 200 - 80 = 220

Daniel donated $220 to the charity.

Problem 9 :

Mr. Dustin invested $250 in a stock. In one day, he got a profit of $45, loss of $53 per day for two consecutive days and profit of $35 per day for three consecutive days. Determine the present value of the stock.

Solution :

250 + 45 - 53 - 53 + 35 + 35 + 35 = 294

The present value of the stock is $294.

Problem 10 :

In a word document, Jessica typed 45 lines in the first hour, 42 lines in the second hour and 53 lines in the third hour. Since there were some mistakes, she deleted the last 18 lines. Find the total number of lines in the document now.

Solution :

45 + 42 + 53 - 18 = 122

Total number of lines in the word document now is 122.

Problem 11 :

Four places A, B, C and D are on a straight line as shown below.

The distance between A and B is 52 miles, B and C is 84 miles and that of C and D is 129 miles. Find the distance between A and D.

Solution :

Distance between A and D :

= AB + BC + CD

= 52 + 84 + 129

= 265 miles

Problem 12 :

Four places A, B, C and D are on a straight line as shown below.

Mr. Alex travelled from A to B, then B to C and C to D. The distance between A and B is 52 miles and that of B and C is 100 miles. If D is a place halfway between B and C, find the total distance travelled by Mr. Alex.

Solution :

Distance between A and B = 52 miles

Distance between B and C = 100 miles

Since D is the place halfway between B and C, 

distance between C and D = 50 miles

Total distance travelled by Mr. Alex :

= AB + BC + CD

= 52 + 100 + 50

= 202 miles

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