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Lesson Table Topics Discussion Quiz: Class Homework

Example1

Title: Multiplication

Grade 4+ Lesson s1-l4

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 42 x 29.

Step: 1

First, place the multiplicand 42 on top, and write the multiplier 29 below it.

Next, multiply the ones digit of the multiplier, 9, with the multiplicand 42. This will give you 42 × 9 = 378. Write this as the first partial product on a new line.

$1a$

Explanation:

In this step, we’ll multiply 42 by 9. First, multiply 2 by 9 to get 18. Place 8 in the one’s place and carry 1 to the tens column. Next, multiply 4 by 9 to get 36. Add 36 to the carried-over 1 to get 37. Therefore, the answer is 378, 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 42 × 2 = 84. Finally, we get 840.

$2a$

Explanation:

In this step, multiply the bottom tens digit, 2, by the number on the top, 2. So, 2 x 2 = 4. Write down the number 0 next to the 0. For 4 x 2 = 8, write the number 8 next to the 4 you already wrote down. This way, you will get the final answer of 840. This is the second partial product placed in another line.

Step: 3

Add both partial products to get the final product This will be 378 + 840 =1218.

$3a$

Explanation:

Add both of your results to get a final answer. Now need to add 378 + 840 to get 1218.