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Published byLogan Hill Modified over 9 years ago
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It’s time for Math Class Today we are going to be working on 2-digit by 2-digit multiplication. Yuk Math…I’m out of here!
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Let’s start with a quick review! What is multiplication? What is a factor? What is a product? Why should I care?
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Now how do I solve this problem? 6 X 5=
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Boy, am I in trouble I don’t have Enough fingers to solve this problem. What on Earth am I going to do? 6 X 5=
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I know just the person to ask for help on solving this problem. My friend Handy Andy! Hi Goofy What’s up?
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I’m having big problems with multiplication. Can you help me out? Absolutely! That’s what friends are for! Let’s see the problem and get started.
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6 X 5= Here’s the problem but I don’t know what to do?
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6 X 5= That’s easy Goofy! Watch me solve it. I have 6 arms. On each arm I have a hand with 5 fingers so I can count by fives 6 times. Count with me! 5,10,15,20,25,and 30 So 6 X 5 = 30 See that was easy! Anything else you need help with? 10 5 15 20 25 30
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WOW! That was easy for him to do he’s so SMART!!! I wonder if Handy Andy Can do 2-digit multiplication too? 23 x 45 = ? 26 X 35
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Hey Handy Andy do you know how to do 2-digit by 2 digit multiplication? I’m having some troubles with those too! Of course I do Goofy! I’ll show you how in 6 easy steps. One step for every one of my hands.
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6 Easy Steps to 2-Digit by 2-Digit Multiplication Step 1: multiply 5 x 3 and write it down. Go to Step 2. 23 X 45 15
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Step 1: multiply 5 x 3 and write it down. Step 2: multiply 5 x 20 and write it down. Go to Step 3. 23 X 45 15 100
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Step 1: multiply 5 x 3 and write it down. Step 2: multiply 5 x 20 and write it down. Step 3: multiply 40 x 3 and write it down. Go to Step 4. 23 X 45 15 100 120
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Step 1: multiply 5 x 3 and write it down. Step 2: multiply 5 x 20 and write it down. Step 3: multiply 40 x 3 and write it down. Step 4: multiply 40 x 20 and write it down. Go to Step 5. 23 X 45 15 100 120 800
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Step 1: multiply 5 x 3 and write it down. Step 2: multiply 5 x 20 and write it down. Step 3: multiply 40 x 3 and write it down. Step 4: multiply 40 x 20 and write it down. Step 5: add all the numbers up. Go to Step 6. 23 X 45 15 100 120 + 800 1035
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Step 1: multiply 5 x 3 and write it down. Step 2: multiply 5 x 20 and write it down. Step 3: multiply 40 x 3 and write it down. Step 4: multiply 40 x 20 and write it down. Step 5: add all the numbers up. Step 6: check your work carefully. 23 X 45 15 100 120 + 800 1035
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Now that wasn’t so bad was it?
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It’s really easy when you know all your Facts!
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Now go practice some on your own! GOOD LUCK!
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