Bonsoir,
a/ -3/10 × 5/13
= -15/130 = -3/26
b/ 25/16 × -12/15
= -300/240 = 30/24 = 10/8 = 5/4
c/ -9/28 × 56/63
= -504/ 1764 = -252/882 = 126/441 = 14/49 = 2/7
d/ -7/6 ÷ 3/4 =
-7/6 * 4/3 = -28/18 = -14/9
e/ 3/8 ÷ -3/4
=
3/8*-3/4 = -9/32
f/ -5/9 ÷ -8/3=
-5/9*-3/8 = 15/72 = 5/24
