Question

ex 19, 26,18: Dau coroana Urgent va rog

Answer 1

ex 19 )
a ) (-4) *(-213) * (+25) = (+ 21300)
b)  (15) * ( -117)*(-2) = (+3510)
c) (-2) *37 * (+4) * (-125) = (+37000)
d) 50 * ( -17) * ( -200)* nu am inteles  ce era la sfarsit
e) (-5) * (-217) * (-4) * (-10) = (+ 43400)
f) (-15 ) * 313 * (-8) * ....... =( + 37560) *(.....) nu am inteles

ex 18)
a) - 3  * [77 - (+23)] = -3 * 54 =( -162)
b) 8 * ( -3 +5) * ( -2) = 16 * (-2) = (-32)
c) -4 * (11-7) + 10 * [(-23 ) + 18] = ( -16) + 10 * (-5) = -16 - 50 = ( - 66)
d) (-7+15) * (10 - 2........) = 8 * (.........)
e) ( - 4 - 5) * ( - 6) = ( - 9) * ( - 6) = 54
f) 9 * ( - 5 + 2) - 4 * ( 6- 2 ) = 9 * (- 3 ) - 4 * 4=  ( - 27 ) -16 = ( - 43)
g) 13 * 15 +13 * (- 14) = 13 * ( 15 -14) = 13 * 1 = 13
h) 315 * 12 -315 * 11 = 315 * ( 12 - 11) = 315 * 1 = 315

ex 26)
a) [(-306) * ( -3 ) +87*(-12)] * 0 = 0
b )-3 -10 * [ 362 -10 *( -24 -2 *3)]=  -3 -10 * [362 -10 * ( -30 )] =  -3 -10 * (362+300)] = -3 - 10 * 662 = -3 - 6620 = (- 6623)
c) -10  * { 100 - [100 - (100 -1)]} = -10 * [100 - (100 - 99)] =  -10 * (100 - 1)= -10 * 99 = ( -990)
d) -1 +5 * [( - 4 - 2) * (-5) -17 ] - (18-10) * (+7) =  -1 + 5 * (+30 -17) - 56 = -1 + 5 * 13 - 56 = -1+ 65 - 56 = -1 +9 = 8
e ) {-3 * [-7* (15 -10 - 2) -3 * ( - 8) +5] + 20 - 4 } * (+ 2) ={ [ - 3 * (-7 * 3) +24 + 5] +20 - 4 } *2 = [ (-3)* (- 21)+24 +5] +16} * 2 = ( 63 +24 +5 +16) *2 = 108 *2
= 216