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20 - 30 =50 what did I do wrong on this problem
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20 - 30 =50 what did I do wrong on this problem

User Max Svidlo
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1 Answer

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The expression 20-30 can be solved as:


20-30=20-(20+10)=20-20-10=0-10=-10

In a ruler, we can draw this expression as:

20 - 30 =50 what did I do wrong on this problem-example-1
User JRP
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