Question

calculați dau coroana

-5+7-6+3-2+4
(+5-11+3)*(+4-8+6
+3[+3*(-8+6-4)+15]+21
-3{-8-3[-2*(+4-7+5-3)*(-6+4-3)+6]}
-5+7-6+3-2+4
(+5-11+3)*(+4-8+6
+3[+3*(-8+6-4)+15]+21
-3{-8-3[-2*(+4-7+5-3)*(-6+4-3)+6]}
​

Answer 1

○ -5+7-6+3-2+4 = 2-6+3-2+4 = -4+3-2+4 = 3-1 = 1

○ (+5-11+3)*(+4-8+6) = (-6+3)*(-4+6) = (-3)*2 = -6

○ +3[+3*(-8+6-4)+15]+21 = 3[3*(-6)+15]+21 = 3(-18+15)+21 = 3(-3)+21 = -9+21 = 12

○ -3{-8-3[-2*(+4-7+5-3)*(-6+4-3)+6]} = -3{-8-3[-2(-1)*(-5)+6]} = -3[-8-3(-4)] = -3(-8+12) = -3*4 = -12

○ -5+7-6+3-2+4 = 2+7-6+3-2+4 = 9-6+3-2+4 = 3+3-2+4 = 6-2+4 = 4+4 = 8

○ (+5-11+3)*(+4-8+6) = (-6+3)*(-2+6) = (-3)*4 = -12

○ +3[+3*(-8+6-4)+15]+21 = 3[3(-6)+15]+21 = 3(-18+15)+21 = 3(-3)+21 = -9+21 = 12