5. (-2) + 3 : (-3) - 4 =-10 + 3 : -7 =-7 : -7 = 1
-25 : (-5) -4 . 3 + 2.2 = -25 : (-5 ) - 12 + 4=-25 : - 13 =1.923 = 1923 x10 ^-3
-1 + 7(2 - 4.3) - 10 =-1 + 7 (2 - 12) - 10 =-1 + 14 - 84 -10 =-81
-20: (-5) - (4 - 6: 2 ) =-20 : -5 - (4 - 3) = -20 : -5 - 4 + 3 =-20 : -6 = 3.333 = 3333 x 10^ -3
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5. (-2) + 3 : (-3) - 4 =
-10 + 3 : -7 =
-7 : -7 = 1
-25 : (-5) -4 . 3 + 2.2 =
-25 : (-5 ) - 12 + 4=
-25 : - 13 =
1.923 = 1923 x10 ^-3
-1 + 7(2 - 4.3) - 10 =
-1 + 7 (2 - 12) - 10 =
-1 + 14 - 84 -10 =
-81
-20: (-5) - (4 - 6: 2 ) =
-20 : -5 - (4 - 3) =
-20 : -5 - 4 + 3 =
-20 : -6 =
3.333 = 3333 x 10^ -3