## Part One

## Lesson 4 – Subtraction

**Exercise**

**1. Arrange vertically and subtract.**

**(1) 586 – 425**

**Ans:**

**(2) 465 – 179****Ans:**

**(3) 542 – 351**

**Ans: **

**(4) 754 – 287 **

**Ans: **

**(5) 500 – 365**

**Ans: **

**(6) 502 – 307**

**Ans: **

#### 2. If 400 – 100 = 300, solve 477 – 177. Write three subtraction problems with the answer 200.

**Ans:** 477 – 177 = 200

Three subtraction problems with the answer 200:

400 – 200 = 200

625 – 425 = 200

991 – 791 = 200

#### 3. Rajani buys a uniform worth ₹372 and a school bag worth ₹250. How much more does she spend on the uniform than on the bag?

**Ans:**

3 7 2 uniform

– 2 5 0 school bag

1 2 2

Rajani spend ₹122 more on the uniform

#### 4. The answer to an addition is 915. One of the numbers is 427. Which is the other number?

**Ans:**

The other number is 488

#### 5. The answer to an addition is 915. Choose any number smaller than 800 as one of the numbers. Find the other number.

**Ans:**

The other number is 300

#### 6. Using the numbers 534 and 252, write a subtraction word problem and solve it.

**Ans:**

Problem : Ramesh had 534 marbles, he gave 252 marbles to Gopal. How many marbles were left with Ramesh?

282 marbles were left with Ramesh

**Exercise**

**1. Subtract the following.**

**(1) 5600 – 2300****Ans:**

**(2) 5795 – 180****Ans:**

**(3) 2589 – 1354****Ans:**

**2. Arrange horizontally and subtract.**

**(1) 5555 – 2222****Ans: **5555 – 2222 = 3333

**(2) 8740 – 3520****Ans: **8740 – 3520 = 5220

**(3) 9586 – 432****Ans: **9586 – 432 = 9154

**(4) 3256 – 24****Ans: **3256 – 24 = 3232

**3. If 5000 – 2000 = 3000, then 5888 – 2888 = ?****Ans: **5888 – 2888 = 3000

**4. Write three subtraction problems with the answer 2000.****Ans:**

6000 – 4000 = 2000

3255 – 1255 = 2000

8000 – 6000 = 2000

**5. Using the words ‘literate’ and ‘illiterate’ and the numbers 4765 and 2142, write a subtraction problem and solve it.****Ans:**

Problem : In a village in Mysore there are 4765 people. There are 2142 illiterate people. How many literate people are there in the village?

4 7 6 5 people

– 2 1 4 2 illiterate

2 6 2 3 literate

2623 literate people are there in the village

**6. Whose subtraction is correct? Why?**

**Ans: **Kunda is correct. As he is using the right-to-left method of subtraction. Subtraction always starts from the units column (place) on the right and then moves further to the left in tens, hundreds, and thousands.

**Exercise**

**1. Subtract.**

**(1) 4215 – 2649****Ans:**

**(2) 7123 – 5784****Ans:**

**(3) 3014 – 2527****Ans:**

**(4) 6325 – 758****Ans:**

**2. Arrange vertically and subtract.**

**(1) 3245 – 1127**

**Ans:**

**(2) 6007 – 2345**

**Ans:**

**(3) 6037 – 4043**

**Ans:**

**(4) 4752 – 2384**

**Ans:**

**(5) 4004 – 3156**

**Ans:**

**(6) 8042 – 3129**

**Ans:**

**(7) 6524 – 2656**

**Ans:**

**(8) 5305 – 2169**

**Ans:**

**(9) 6052 – 2763**

**Ans:**

**(10) 8235 – 4192**

**Ans:**

**(11) 4000 – 3999**

**Ans:**

**(12) 8020 – 5432**

**Ans:**

**Exercise**

**1. Subtract.**

**(1) 17432 – 14321****Ans:**

**(2) 34567 – 13256****Ans:**

**(3) 59325 – 37124****Ans:**

**(4) 38976 – 27405****Ans:**

**2. Arrange vertically and subtract.**

**(1) 13908 – 2705**

**Ans:**

**(2) 23457 – 346**

**Ans:**

**(3) 85679 – 74056**

**Ans:**

**(4) 69876 – 54321**

**Ans:**

**Exercise**

**(1) 42715 – 21618****Ans:**

**(2) 56824 – 32465****Ans:**

**(3) 78235 – 43759****Ans:**

**(4) 34429 – 15219****Ans:**

**(5) 50709 – 32815****Ans:**

**(6) 67000 – 38765****Ans:**

**(7) 50000 – 35000****Ans:**

**(8) 84540 – 24899****Ans:**

**(9) 70000 – 19075****Ans:**

**Exercise**

#### Add and subtract the following pairs of numbers orally, using your own methods. If your friend’s method is different, try to understand it.

**(1) 90, 50**

**Ans: **

90 + 50 = 140

90 – 50 = 40

**(2) 35, 65 ****Ans:**

65 + 35 = 100

65 – 35 = 30

**(3) 47, 23****Ans:**

47 + 23 = 70

47 – 23 = 24

**(4) 16, 74****Ans:**

74 + 16 = 90

74 – 16 = 58

**(5) 70, 38****Ans:**

70 + 38 = 108

70 – 38 = 32