AR- patterns — task. Mathematics CBSE, Class 7 New.

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Assertion: To calculate \(19 \times 5\), it is easier to think of it as \((20 \times 5) - 5\)

Reason:\(20\) is a benchmark number that is simpler to multiply than \(19\).

Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion
Assertion is false, but Reason is true.
Assertion is true, but Reason is false.
Both Assertion and Reason are true, and Reason is the correct explanation of Assertion

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