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Arithmetic Progression

Question 33 F...

Question

Question 33

Fill in the blanks to make the statement true.

$(- 157) \times (- 19) + 157 =$ ___ .

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Solution

Given $(- 157) \times (- 19) + 157 = [(- 1) \times (157) \times (- 19)] + 157$
Taking $157$ as common
$= 157 (19 + 1)$
$= 157 \times 20 ∴ (- 157) \times (- 19) + 157 = 3140$

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Arithmetic Progression

Standard X Mathematics

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