Thursday, June 23, 2016

Math: Subtraction

Subtract by adding.

Example: 673,493 - 2,763 = 670,730

Add 7 to 3 to get 2,770

(0 + 7) = 7

Add 30 to 2,770 to get 2,800

(7 + 30) = 37

Add 200 to 2,800 to get 3,000 

(200 + 37) = 237

Add 7,000 to 3,000 to get 10,000

(7,000 + 237) = 7,237

Add 90,000 to 10,000 to get 100,000

(90,000 + 7,237) = 97,237

Add 573,000 to 100,000 to get 673,000

(573,000 + 97,237) = 670,237

Add 493 to 673,000 to get 673,493

(493 + 670,237) = 670, 730

Final Answer: 630,730

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