20 20 20..... 20 times=(1+1+1........ 20 times )× ( 20) =20× ( 20)0ex0ex= 400 ...

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Standard IV

Mathematics

Associative Property of Multiplication

-20-20-20.......

Question

$- 20 - 20 - 20 . . . . . 20 t i m e s =$ ______

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Solution

$- 20 - 20 - 20 . . . . . 20 t i m e s = (1 + 1 + 1 . . . . . . . . 20 t i m e s) \times (- 20)$
$= 20 \times (- 20) = - 400$

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-20-20-20.....20times=______

-20-20-20.....20times=(1+1+1........20times)×(-20) =20×(-20)=-400

$- 20 - 20 - 20 . . . . . 20 t i m e s =$ ______

$- 20 - 20 - 20 . . . . . 20 t i m e s = (1 + 1 + 1 . . . . . . . . 20 t i m e s) \times (- 20)$
$= 20 \times (- 20) = - 400$