Réponse:
A = -1+4x(-1)-2+(-10)÷(-5)
= -1+(-4)-2+2
= -5
B = 7/5 + 6/2 x 2/3
= 7/5 + 6x2/2x3
= 7/5 + 12/6 ÷ 6
= 7/5 + 2/1 x 5
= 7/5 + 10/5
= 17/5
C = 5/7 - 2/7 ÷ (-3)
= 5/7 + 2/21
= 5/7 x 3 + 2/21
= 15/21 + 2/21
= 17/21
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Réponse:
A = -1+4x(-1)-2+(-10)÷(-5)
= -1+(-4)-2+2
= -5
B = 7/5 + 6/2 x 2/3
= 7/5 + 6x2/2x3
= 7/5 + 12/6 ÷ 6
= 7/5 + 2/1 x 5
= 7/5 + 10/5
= 17/5
C = 5/7 - 2/7 ÷ (-3)
= 5/7 + 2/21
= 5/7 x 3 + 2/21
= 15/21 + 2/21
= 17/21