Find the product (-20) X (-2) X (-5) X (7) using suitable properties.
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Find the product (-20) X (-2) X (-5) X (7) using suitable properties.
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Answer:
(-20)×(-2)×(-5)×(7)
properties were (-)×(-)=(+)
(-)×(+)=(-)
(+)×(+)=(+)
(+)×(-)=(-)
(-20)×(-2)×(-5)×(7)
40×(-5)×(7) {(-20)×(-2)=(+40)}
(-200)×(7) {(40)×(-5)=(-200)}
-1400(Ans.) {(-200)×(7)=(-1400)}
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