SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 4-a Lesson: S2-L4

Explanation: The best way to understand multiplications is by looking at some examples. Take turns and read each example for easy understanding.

Examples:

Step: 1a

Find the product of 55 x 23

Arrange the numbers in vertically.

$1a$

Explanation: Place the multiplicand 55 on top and multiplier 23 on bottom.

Step: 1b

Multiply the one’s digits on the top number by the one’s digit of the bottom number. Here the digits are 5 x 3=15..write the 5 in ones column. Carryover the 1 that goes in the next place.

$1b$

Explanation: When 5 is multiplied by 3, we get 15. Write 5 in one’s column. Carryover the 1 that goes to the next place

Step: 1c

Multiply the tens digits on the top number by the ones digit of the bottom number…Here the digits are 5 x 3=15 Add the carryover number 1. Now 15 + 1=16, write this value beside the ones place digit. Here the first partial product is 165

$1c$

Explanation: When 5 is multiplied by 3, we get 15. Add the carryover number 1. Now 15 + 1=16, write this value beside the one’s place digit. Here the first partial product is 165. That will be placed in one line.

Step: 1d

Multiply the one’s digits on the top number by the tens digit of the bottom number…Here the digits are 5 x 2=10..write the 0 in tens column. Carryover the 1 that goes in the next place.

$1d$

Explanation: When 5 is multiplied by 2, we get 10. write the 0 in the tens column under the first partial product. Carryover the 1 that goes in the next place.

Step: 1e

Multiply the tens digits on the top number by the tens digit of the bottom number. Here the digits 5 x 2=10. Add the carryover number 1. Now 10 + 1=11, write this value beside the one’s place digit. Here the second partial product is 110.

$1e$

Explanation: When 5 is multiplied by 2, we get 10. Add the carryover number 1. Now 10 + 1=11, write this value beside the one’s place digit. Here the second partial product is 110. that will be placed on another line. We have to put the 0 in the one’s column.

Step: 1f

Add the both first and second partial products 165 + 1100=1265

$1f$

Explanation: Add both of your results to get a final answer. Now need to add 165 + 1100 to get 1265.