WORD PROBLEMS ON SUBTRACTING WHOLE NUMBERS

Problem 1 :

The high temperature on June 2 in Las Vegas was 80 degrees and the low temperature was 63 degrees. What was the difference between the high and low temperatures?

Solution :

High temperature = 80 degrees

Low temperature = 63 degrees

Difference between high and low temperature = 80 - 63

= 17 degrees

Problem 2 :

There are 82 students in the school band and 46 in the school orchestra. What is the difference between the number of students in the band and the orchestra?

Solution :

Number of students in band = 82

Number of students in orchestra = 46

Difference between number of students  = 82 - 46

= 36

Problem 3 :

John wants to buy a laptop that costs $840. He has $685 in his savings account. How much more does he need to save in order to buy the laptop?

Solution :

Cost of laptop = $840

Amount in his savings amount = 840 - 685

= 155

So, he needs to save $155 more to buy the laptop.

Problem 4 :

A mountain bike is on sale for $399. Its regular price is $650. What is the difference between the regular price and the sale price?

Solution :

Cost of bike on sale = 399

Regular price = 650

Difference between regular price and sale price = 650 - 399

= 251

So, the required difference is $251.

Problem 5 :

Mason had $1,125 in his checking account. He spent $892. How much money does he have left?

Solution :

In his checking amount, he has = $1125

Amount he spent = $892

Amount left = 1125 - 892

= $233

Problem 6 :

Noah was driving from Philadelphia to Cincinnati, a distance of 502 miles. He drove 115 miles, stopped for gas, and then drove another 230 miles before lunch. How many more miles did he have to travel?

Solution :

Actual distance between Philadelphia to Cincinnati = 502

Distance covered before gas = 115 miles

Distance covered before lunch = 230 miles

Distance covered sofar = 230 + 115

= 345

Distance to be covered = 502 - 345

= 157

So, 157 miles to be covered.

Problem 7 :

Sara needs 350 points to pass her course. She scored 75, 50, 70, and 80 on her first four tests. How many more points does Sara need to pass the course?

Solution :

Required marks = 350

Number of points scored sofar = 75 + 50 + 70 + 80

= 275

Marks need to be scored = 350 - 275

= 75

Problem 8 :

Olivia’s third grade class has 35 children. Last year, her second grade class had 22 children. What is the difference between the number of children in Olivia’s third grade class and her second grade class?

Solution :

Number of students when she is in third grade = 35

Number of students when she is in second grade = 22

Difference between number of students = 35 - 22

= 13

Problem 9 :

A mattress set is on sale for $755. Its regular price is $1,600. What is the difference between the regular price and the sale price?

Solution :

Sale price of mattress = $755

Regular price of mattress = $1600

Difference between regular price and sale price = 1600 - 755

= 845

Problem 10 :

A washing machine is on sale for $399. Its regular price is $588. What is the difference between the regular price and the sale price?

Solution :

Sale price = $399

Regular price of washing machine = $588

Difference between the prices = 588 - 399

= 189

Problem 11 :

Mark buys a scarf, two badges and a whistle from a sports shop. How much change does he receive from £20.00?

a) £12.04    b) £12.96    c) £11.04     d) £11.96    e) £11.00

Solution :

= Cost of a scarf + Cost of two badges + Cost of a whistle

= 3.99 + 2(0.99) + 1.99

= 3.99 + 1.98 + 1.99

= 7.96

Required change = 20 - 7.96

= £12.04

So, option a is the correct answer.

Problem 12 :

Which of these calculations gives the largest amount?

a) 21 × 20 – 18 + 19        b) 18 × 19 – 21 + 20       c) 20 × 18 – 19 + 21

d) 21 × 18 – 20 + 1      e) 20 x 19 - 21 + 18

Solution :

So, option a is greater.

Problem 13 :

A person had $1000000 with him. He purchased a colour T.V. for $16580, a motor cycle for $45890 and a flat for $870000. How much money was left with him?

Solution :

Amount has initially = 1000000

Cost of colour TV = $16580

Cost of motor cycle = $45890

Cost of flat = $870000

Required money left with him = 1000000 - (16580 + 45890 + 870000)

= 1000000 - 932470

= 67530

So, the money left with him is $67530.

Problem 14 :

Out of 180000 tablets of Vitamin A, 18734 are distributed among the students in a district. Find the number of the remaining vitamin tablets.

Solution :

Total number of tablets of Vitamin A = 180000

Number of tablets distributed among them = 18734

Number if remaining vitamin tablets = 180000 - 18734

= 161266