base-10 multiplication

Base-10 MultiplicationMultiplying 2-digit by 1-digit numbers

with base-10 blocks

Carbs!

Teachers have different nicknames for base-10blocks

This presentation uses waffles, fries and tater tots

Waffles=100; Fries=10; Tater tots=1

Ready, Set, Go!!Let's Begin with 23x3

Representing

First, let's represent 23 with our base-10 notation

That's two tens and 3 ones

Or 2 fries and 3 tots

Here we go...

Multiplying 23 x 3

Draw 3 sets each with 2 fries and 3 tots

French Fries

There are 2, 4, 6 fries

That's 6 tens or ...

60

Tater Tots

There are 3, 6, 9 tater tots

That's 9 ones or...

9

Add it up

So we have 6 tens and 9 ones

AKA

60 + 9

AKA 69

So 23 x 3 = 69

But wait!!What if you have to regroup?

Chill...Let's try 125 x 5

Carbo-loading

That's one waffle,Two fries,

& 5 tater tots Written 5 times

Waffles

So that's 5 waffles...

Or 5 hundreds

Or 500

Fries

That's 10 fries

Or 10 tens

Or 100

So ten fries makes another waffle

Tater Tots

That's 25 ones

Or 25

So 25 tater tots can be traded for 2 fries and 5 tots

Wrap it up...

So 125 x 5 = 625

This is what it might look like on a sheet notebook paper-->

I hope this helps...Here's a picture of your mother driving

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