Pouvez vous m'aider donner les résultats sous forme de fractions irréductibles 3/4-5/14= -15/4-4/5= 1/2-3/5+2/3+7/10= 3/-16×2/-9= -25/49×(-28/5)×33/10= 3/14+1/1

bonjour

3 /4 - 5/14 =  21/28 - 10/28 = 11/28

- 15/4 - 4/5 = -  75/20 - 16/20 = - 91/20

1/2  - 3/5 + 2/3 + 7/10 =  15/30 - 18/30 + 20/30 + 21/30 = 38/30 = 19/15

- 25/49 x ( - 28/5) x 33 /10  =  700/245 x 33 /10 = 23 100 / 2 450 = 66/7

3/14 + 1/14 x - 3/9 = 3/14 - 3/ 126 = 27/126 - 3/126 = 24/126  = 4 / 21

Réponse :

bonsoir

Explications étape par étape

3/4-5/14=(3x7)/(4x7)-(5x2)/(14x2)=21/28-10/28=11/28

-15/4-4/5=(-15x5)/(4x5)-(4x4)/(5x4)=-75/20-16/20=-91/20

1/2-3/5+2/3+7/10

1/2-3/5=(1x15)/(2x15)-(3x6)/(6x5)=15/30-18/30=-3/30

2/3+7/10=(2x10)/(3x10)+(7x3)/(10x3)=20/30+21/30=41/30

-3/30+41/30=38/30=(19x2)/(15x2)=19/15

3/-16×2/-9=6/144=(6x1)/(24x6)=1/24

-25/49×(-28/5)×33/10=23100/2450=(23100÷10)/(2450÷10)=2310/245=(2310÷5)/(245÷5)=462/49=(462÷7)/(49/7)=66/7

3/14+1/14×-3/9

1/14x-3/9=-3/126+3/14=-3/126+(3x9)/(14x9)=-3/126+27/126=24/126=(4x6)/(21x6)=4/21