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Lesson Table Topics Discussion Quiz: Class Homework

Example1

Title: Multiplication

Grade 4+ Lesson s1-l7

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 45 x 17.

Step: 1

First, place the multiplicand 45 on top and write the multiplier 17 below it.

Next, multiply the ones digit of the multiplier, 7, with the multiplicand 45. This will give you 45 × 7 = 315. Write this as the first partial product on a new line.

$1a$

Explanation:

In this step, we’ll multiply 45 by 7. First, multiply 5 by 7 to get 35. Place 5 in the one’s place and carry 3 to the tens column. Next, multiply 4 by 7 to get 28. Add 28 to the carried-over 3 to get 31. Therefore, the answer is 315, the first partial product placed in one line.

Step: 2

Write a 0 in the one’s column. Multiply 1 by the multiplicand. This will give 45 × 1 = 45. Finally, we get 450.

$2a$

Explanation:

In this step, multiply the bottom tens digit, 1, by the number on the top, 5. So, 5 x 1 = 5. Write down the number 0 next to the 0. For 4 x 1 = 4, write 4 next to the 5 you already wrote down. This way, you will get the final answer of 450. This is the second partial product placed in another line.

Step: 3

Add both partial products to get the final product This will be 315 + 450 =765.

$3a$

Explanation:

Add both of your results to get a final answer. Now need to add 315 + 450 to get 765.