ADJEVIALEC
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Calculer en notant les étapes de calcul (ne pas oublier de simplifier les fractions)

B= 20 − 3 × (7 + 4)²+ 6

C= 20 − 37 + 4²+ 6

[tex]D= \frac{4}{7}+\frac{3}{5}\\[/tex]

[tex]E=\frac{4}{7}*\frac{3}{5}[/tex]

[tex]F=\frac{2}{3}-\frac{4}{5}*\frac{10}{3}[/tex]

[tex]G=(\frac{3}{4} -\frac{1}{2})*\frac{5}{2}-\frac{7}{8}[/tex]

Sagot :

MOULAMAYA

Pour la C :

C= 20 − 37 + 4²+ 6

= 20- 37+16+6

= 5

View image MOULAMAYA
UNEINCONNUE6

B= 20 - 3 × 11 au carré +6

= 20 - 3 × 121 + 6

= 20 - 363 + 6

= - 343 + 6

= -337

C= 20 - 37 + 16 +6

= -17 + 22

= 5

D= 4/7 + 3/5

= 4×5/7×5 + 3×7/ 5×7

= 20/35 + 21/35

= 41/35

E= 4/7 × 3/5

= 12/35

F= 2/3 - 4/5 × 10/3

= 2/3 - 40/15

= 2×5/3×5 - 40×1/15×1

= 10/15 - 40/15

= 10-40/15

= -30/ 15

= -3×10/ 3×5

= -10/5

G= (3/4 - 1/2 )× 5/2-7/8

= 3×3/4×3 - 1×6/2×6 ×5/2 -7/8

= 9/12 - 6/12 × 5/2 - 7/8

= 3/12 × 5/2 -7/8

= 15/24 -7/8

= 15×1/ 24/1 - 7×3/8×3

= 15/24 - 21/24

=-6/24

= -3×2/ 3×8

= -2/8