[" 1."(180times15-12times20)/(140times8+2times55)],[[" a) "(1)/(7)," b) "(4)/(5)," c) "2," d) "4]]

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(180xx15-12xx20)/(140xx8+2xx55)=?( a) (1)/(7)(b)(4)/(5)(c)2 (d) 4 (e) None of these

Evaluate: (-5) times (-20) times (-12) times (-1)

[(1)/(4)+(1times3)/(4times8)+(1times3times5)/(4times8times12)]=

1+(1)/(4)+(1times3)/(4times8)+(1times3times5)/(4times8times12)=

15+[25+{(6+3)times2+(8times16-:2)}]

Evaluate : 8 times 7 times ---- =12 times 8 times -----

12 times (28 -15)="________"-(12 times 15)

Evaluate: a. (12 times (-15) times (24))/((-3) times 5) b. 90 times (-4) +405 div [110-{25-(25 times2)}]

(-8)times9+(-8)times7],[" (iii) "20times(-16)+20times14 , (-11)times(-15)+(-11)times(-25)