4th Grade Math Multiplying 2-digit by 2-digit Numbers Using the Area Model / Box Method.
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4th Grade Math Multiplying 2-digit by 2- digit Numbers Using the Area Model / Box Method
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Transcript of 4th Grade Math Multiplying 2-digit by 2-digit Numbers Using the Area Model / Box Method.
Okay, Let's Multiply!
❖ The top left square...
❖ Is under the 20...
❖ And beside the 40...
❖ So multiply 20 x 40
❖ 800 in the 1st square
How much are those numbers in the Window?
❖ These 4 numbers are the partial products
❖ Add them together to get the final answer
❖ Thanks to the commutative property the order that you add them doesn't matter
❖ In this example, we are adding across first, then adding our two answers