Question

resolva as expressões
15:(-3)=
40-3×(-7)
-7+5×(-10)
72-(+8).(-6)
(-9).(-11)-21
4.(-15)+5.(-10)+72
+9-(-20):(-2)
(-3).(-3).(-3).(-3).(-3)
20-2.(-21)+(-6).(+9)
(+25).(-2).(-2).(-25)
(-56):(+8)+(-49):(-7)
61-4.(-15)+202:(-2)
(+38):(-2)-(-42):(+3)
por favor me ajude. com conta por favor

Answer 1

Caramba, são muitas
$15 \div ( - 3) = - 5 \\ 40 - 3 \times ( - 7) = 61 \\ - 7 + 5 \times ( - 10) = - 57$
$72 - (8) \times ( - 6) = 120 \\ ( - 9) \times ( - 11) - 21 = 78$
$4 \times ( - 15) + 5 \times ( - 10) + 72 = - 38 \\ 9 - ( - 20) \div ( - 2) = - 1 \\ ( - 3) \times ( - 3) \times ( - 3) \times ( - 3) \times ( - 3) = - 243$
$20 - 2 \times ( - 21) + ( - 6) \times ( + 9) = 8 \\ ( + 25) \times ( - 2) \times ( - 2) \times ( - 25) = - 2500$
$( - 56) \div ( + 8) + ( - 49) \div ( - 7) = 0 \\ 61 - 4 \times ( - 15) + 202 \div ( - 2) = 20 \\ ( + 38) \div ( - 2) - ( - 42) \div ( + 3) = - 5$