bonjour
( 2 + 3/4 ) : ( 3/4 - 5 )
= ( 8/4 + 3 /4 ) : ( 3/4 - 20/4 )
= 11 /4 : - 17/4
= 11/4 x - 4/17
= - 44/ 68
= - 11/17
35 x 2 x 10 ² x 10 ⁻¹² : 42 x 10 ⁻¹⁰
= 70 x 10 ⁻¹⁰ : 42 x 10 ⁻¹⁰
= 70/42 x 10 ⁰
= 5 / 3
3 x 10 ⁴ + 5 x 10 ⁻³ : 10 ⁻²
= 30 000 + 0.005 : 0.01
= 30 000 .005 : 0.01
= 3 000 000 .5
