Réponses

2013-01-20T12:59:49+01:00

-4/9 * 27/12 + 16/8 * 5/-4

= -4*9*3/9*3*4 + 4*4*5/ 8*(-4)

= -4/4 + 80/-32

= -4* (-8)/4* (-8) + 80/ -32

= 32/-32 + 80/ -32

=32+80/-32

=112/-32

= -7*16/16*2

=-7/2