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Question

Fill in the blanks with the suitable value: 19−5+[−311+−78]=[19−5+ –––– ]+−78

A
311
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B
311
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C
311
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D
0
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Solution

The correct option is B 311

We know, as per associative property of rational numbers for addition we can write,
(a+b)+c=a+(b+c) [For any rational number a,b and c]

So, we can write given expression 195+[311+78] as [195+311]+78
And after comparing we can say value for the blank will be 311
Hence, option 'b' is correct.

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