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23 - 5 = 18
b. (-3) +5 -(-8)
-3 +5 +8
-3 +13 = 10
c. (-2) × (-4) +(7)
-2 × -4 + 7
8 +7 = 15
d. [(-18 +4) -(9 -10)] -15
[-18 +4 -9 +10] -15
-18 +4 -9 +10 -15
-42 +14 = -28
e. [(-9 × 4) -(-22 -14)] ÷ 9
[-9 × 4 +22 +14] ÷ 9
[-36 +22 +14] ÷ 9
[-36 +36] ÷ 9
[ 0 ] ÷ 9 = 0
f. {[(8 × -4) + (-5)] ÷ [(-11 × 2) + (-15)]}
{[-32 -5] ÷ [ -22 -15]}
{[-37] ÷ [-37]}
-37 ÷ -37 = 1
Espero esté todo correcto.