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## Multiplication 3 by 4 Digit (In Grid)

#### Grade 5 Numbers - 5.NBT.B.5

Tips for Multiplying Large Numbers - We all know that multiplication and addition are related. Multiplication only means to add numbers to certain times. To make multiplication easier, most of us learn times table by heart. These times tables help us in solving many two number multiplication sums and benefit in the multiplication of larger numbers. For instance, you can easily answer 2x 3= 6, but for multiplication of 14 x 34 or 234x 44 you need a different approach. Below we have discussed some tips to ease your long multiplication First, write a larger number over the smaller number. Make sure that the tens, units columns of both the numbers line up. For example, you are given to solve 456 into 89. You write 6 of 456 over 9 of 89. Similarly, 5 of 456 will be written over 8 of 89. Start multiplying the units of the smaller number with the larger number. In this case, multiply 9 with unit place of 456. Continue the same method with the tenth place of a smaller number. Remember when multiplying with the tenth place of smaller number start multiplication with a zero. Once you have multiplied the smaller with all three places of the larger number, add your answers. The addition works the same in this case. Start adding numbers from the unit place and proceed to the hundredth place. These worksheets and lessons help students learn how to multiply a value that has a hundreds place by a value that has a thousands place.

### Printable Worksheets And Lessons  #### Homework Sheets

Get ready for some super duper long division for you to work on.

• Homework 1 - The best advice we can give you is to stay organized through out your work on these problems.
• Homework 2 - Note which place values tell you what.
• Homework 3 - See how we split these values into expanded forms.

#### Practice Worksheets

I supplied a few product operation tips here for you.

• Practice 1 - Some students will benefit by learning this skill through the use of expanded form first.
• Practice 2 - Other students will just get this drop down product model quickly.
• Practice 3 - Remember to drop zeroes in there the minute you start on the tens place and beyond.

#### Math Skill Quizzes

These are purposely not lined up. I did this because I have seen this as a new question format that test makers are experimenting with.

• Quiz 1 - These quizzes will see if you really know your stuff.
• Quiz 2 - Don't forget to use place holders, it makes it easier.
• Quiz 3 - Once last quiz to see what you know.