Explications étape par étape:
1) 5 + 3 x (-5)
5 + (-15)
5-15
-10
2) 8- (-15+10)x2
8- (-5) x2
8+5 x2
18
3)-2 x8-4x(-10):2
-16 + 20
4
4)-8+2 x (-5) +9
-8-10+9
-9
5) //
-2 x (-7)
14
6) //
-5-10 : (3+2)
-5-10 :5
-5-2
-7
7) //
4 x (-15+12)
4x(-3)
-12
8)
1+2- 2x2
1+2-4
-1
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Explications étape par étape:
1) 5 + 3 x (-5)
5 + (-15)
5-15
-10
2) 8- (-15+10)x2
8- (-5) x2
8+5 x2
18
3)-2 x8-4x(-10):2
-16 + 20
4
4)-8+2 x (-5) +9
-8-10+9
-9
5) //
-2 x (-7)
14
6) //
-5-10 : (3+2)
-5-10 :5
-5-2
-7
7) //
4 x (-15+12)
4x(-3)
-12
8)
1+2- 2x2
1+2-4
-1