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Lesson Topics Discussion Quiz: Class Homework

Example1

Title: Multiplication

Grade 4+ Lesson s2-l6

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

Examples

Topics → Definition Example1

Find the product of 58 x 21.

Step: 1

First, place the multiplicand 58 on top and write the multiplier 21 below it.

Next, multiply the ones digit of the multiplier, 1, with the multiplicand 58. This will give you 58 × 1 = 58. Write this as the first partial product on a new line.

$1a$

Explanation:

In this step, we’ll multiply 58 by 1. First, multiply 1 by 8 to get 8. Place 8 in the one’s place. Next, multiply 5 by 1 to get 5. Therefore, the answer is 58, the first partial product placed in one line.

Step: 2

Write a 0 in the one’s column. Multiply 2 by the multiplicand. This will give 58 × 2 = 1160. Finally, we get 1160.

$2a$

Explanation:

In this step, multiply the bottom tens digit, 2, by the number on the top, 8. So, 2 x 8 = 16. Write 6 in the tens place and carry 1 to the next column. For 5 x 2 = 10, add 1 (from the carried-over 1) to get 11, and write 11 next to the 2 you already wrote down. This will give you the final answer of 1160. This is the second partial product placed on another line.

Step: 3

Add both the first and second partial products 58 + 1160=1218 .

$3a$

Explanation:

Add both of your results to get a final answer. Now need to add 58 + 1160 to get 1218.