Mathématiques

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Bonjour
SVP aidez moi en maths urgent svp
Bonjour SVP aidez moi en maths urgent svp

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  • Bonjour

    A= 1/5×(-4/3)+7/2= (1×(-4))/(5×3)+7/2= -4/15+7/2= (-4×2)/(15×2)+(7×15)/(2×15)= -8/30+105/30= 97/30

    B= 4/5÷(-3/7)-7/10= 4/5×(-7/3)-7/10= -28/15-7/10= -56/30-21/30=-77/30

    C= 13/7+(-8/7)÷(-4/5)= 13/7+8/7×5/4= 13/7+(8×5)/(7×4)= 13/7+(4×2×5)/(7×4)= 13/7+10/7= 23/7

    D= 7/3+3/2×(-10/21)= 7/3-(3×5×2)/(2×3×7)= 7/3-5/7= 49/21-15/21= 34/21

    E= 5/8+(-3/4)÷(-9/16)= 5/8+3/4×16/9= 5/8+(3×4×4)/(4×3×3)= 5/8+4/3= 15/24+32/24= 47/24

    F= 6/5-(-1/9)×(-3/4)= 6/5-(1×3)/(3×3×4)= 6/5-1/12= 72/60-5/60= 67/60

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