Question

resolva as seguintes expressões :


a) -2 -3.5+4.3 =

b) 28-(-36)/(-6) =

c) 4-12.2-5.8 =

d) -17+(-25)/(-5).(+8) =

e) 3.6-7.5-14.2+26 =

f) (14-35/5)+(-7-42/21) =

g) (-5+2.3).(4-5.2) =

h) (-10-18/6) -(-4-12/4) =

i) (-21+7.3).(-12+4.5) =

j) -15-6.(7-2.5)+(20+24/8) =​

Answer 1

a) -2 -3.5+4.3 => -2 -15 + 12 => -17 +12 => -5

b) 28-(-36)/(-6) => 28 -36/-6 ÷ -6/-6 => 28 - 6 => 22

c) 4-12.2-5.8 = 4 -24 -40 => 4 -64 => -60

d) -17+(-25)/(-5).(+8) => -17 -25/-5 ÷ 5/5 +8 => -17 5.8 => -17 +40 => +23

e) 3.6-7.5-14.2+26 => 18 -35 -28 +26 => 44 - 63 => -19

f) (14-35/5)+(-7-42/21) => (-14 35/5 ÷ 5/5) + (7 42/21 ÷ 21/21) => (-14 × 7) + (7 × 2) => -98 +14 => -84

g) (-5+2.3).(4-5.2) => (-5 +6) . (4 -10) => +1 × -6 => -6

h) (-10-18/6) -(-4-12/4) = (10 18/6 ÷ 6/6) - (4 12/4) => (10 × 3) - 12 => (30) - 12 => 18

i) (-21+7.3).(-12+4.5) => (-21 +21) . (-12 + 4.5) => 0 . (-12 + 4.5) => 0

j) -15-6.(7-2.5)+(20+24/8) => -15 -6 . (7 -10) + (20 + 24/8 ÷ 8/8) => -15 -6 . (7 -10) + (20 + 3) => -15 -6 . (-3) +23 => -15 +18 +23 => -15 +41 => 26

Bons estudos!!