1. Subtraction without renaming
2. Subtraction with renaming

## Topic Recap:

### Subtraction within 100 without renaming

Example:

Ricky has 68 books. He donated 33 books. How many books did he have left?

Solution:

$68 - 33 = 35$

35 books

Question 1:

Fill in the blanks with the correct answer.

$75 - 21 =$ __________

1. 44
2. 54
3. 56
4. 96

(2) 54

## 1. Subtraction without renaming

Example:

There are 837 students staying in a school hostel. 315 of them are girls. How many boys are there staying in the school hostel?

Solution:

$837 - 315 = 522$

522 boys

Question 1:

Fill in the blank with the correct answer:

$697 - 281 =$ __________

1. 416
2. 418
3. 466
4. 479

Solution:

(1) 416

Question 2:

The difference between 753 and 303 is __________.

1. 450
2. 453
3. 550
4. 553

Solution:

$753 - 303 = 450$

(1) 450

## Topic Recap:

### Subtraction within 100 with renaming

Example:

A florist had 100 stalks of flowers. She sold 63 stalks of flowers. How many stalks of flowers is she left with?

Solution:

$100 - 63 = 37​​​​​​​$

37 stalks

Question 1:

Fill in the blank with the correct answer:

$72 - 57 =$ __________

1. 14
2. 15
3. 24
4. 25

Solution:

(2) 15

## 2. Subtraction within 1000 with renaming

Example:

A factory had to manufacture 1000 toys in 2 days. On the first day, 609 toys were manufactured. How many toys were manufactured on the second day?

Solution:

$1000 - 609 = 391$

391

Question 1:

Fill in the blank with the correct answer:

$644 - 589 =$ __________

1. 55
2. 65
3. 145
4. 155

Solution:

(1) 55

Question 2:

Fill in the blank with the correct answer:

$788 - 298 =$ __________ tens

1. 49
2. 51
3. 490
4. 510

Solution:

$788 - 298 = 490$

$490 = 49$ tens

(1) 49

Question 3:

Fill in the blank with the correct answer:

$10$ hundreds $- \;45$ tens $=$ __________

1. 35
2. 55
3. 350
4. 550

Solution:

$10$ hundreds $- \;45$ tens

\begin{align}​​ &= 1000 - 450 \\[2ex] &= 550 \end{align}

(4) 550

Question 4:

Subtract 27 tens from 702.

1. 342
2. 432
3. 675
4. 702

Solution:

$702 - 27$ tens

\begin{align}​​ &= 702 - 270\\[2ex] &= 432 \end{align}

(2) 432

Question 5:

Fill in the missing digit below:

1. 5
2. 2
3. 6
4. 4

Solution:

In the tens place, 8 tens cannot be subtracted from 2 tens. Therefore, we will have to regroup.

So, 1 hundred 2 tens $=$ 12 tens.

12 tens - 8 tens $=$ 4 tens

In the hundreds place, by working backwards,

3 hundreds $+$ 1 hundred $=$ 4 hundreds.

4 hundreds $+$ 1 hundred $=$ 5 hundreds.

(1) 5

Question 6:

Look at the digits below. Use the digits to make the greatest and the smallest 3-digit numbers. What is the difference between the two numbers formed?

1. 396
2. 404
3. 406
4. 496

Solution:

The greatest 3-digit number that can be formed is 975.

The smallest 3-digit number that can be formed is 579.

Difference between the numbers

\begin{align}​​ &= 975 − 579\\[2ex] &= 396 \end{align}

(1) 396

Question 7:

What is the value of              ?

1. 412
2. 900
3. 910
4. 1000

Solution:

Value of the

\begin{align}​​ &= 493 - 199\\[2ex] &= 294 \end{align}

Value of the

\begin{align}​​ &= 294 + 706\\[2ex] &= 1000 \end{align}

(4) 1000

• Subtraction without renaming
• Subtraction with renaming
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