Răspuns :
Salutare!
87-87:87-(100-100:5) =
87-87:87-(100-20)=
87-87:87-80=
87-1-80=
86-80=
6
[42-8:(240:6-216:6)]:4=
[42-8:(40-36)]:4=
(42-8:4):4=
(42-2):4=
40:4=
10
27:3×(250-375:15)-27×15=
27:3×(250-25)-27×15=
27:3×225-405=
9×225-405=
2025-405=
1 620
Explicație pas cu pas:
ღSalutare!ღ
a) 87-87:87-(100-100:5) =
= 87-1-(100-20) =
= 86-80 =
= 6
b) [42-8:(240:6-216:6)]:4 =
= [42-8:(40-36)]:4 =
= (42-8:4):4 =
= (42-2):4 =
= 40:4 =
= 10
c) 27:3×(250-375:15)-27×15 =
= 9×(250-25)-405 =
= 9×225-405 =
= 2 025-405 =
= 1 620
Succes!;)