Réponses

2014-05-26T17:27:58+02:00
A=4×9×0.25
a = 9 x 4x0,25       or 4x0,25 = 1
a = 9x1
a = 9

b=8×31.4×0.125
b = 31,4x8x0,125    or 8x0,125 = 1
b = 31,4x1
b = 31,4

c=2×4.35×100×0.5
c = 4,35x100x2x0,5    or 2x0,5 = 1
c = 4,35x100x1
c =435
2014-05-26T17:30:50+02:00
a = 4 × 9 × 0,25
a = 4 x 0,25 x 9    
a = 1 x 9
a = 9

b = 8 × 31,4 × 0,125
b = 8 x 0,125 x 31,4
b = 1 x 31,4
b = 31,4

c = 2 × 4,35 × 100 × 0,5
c = 2 x 0,5 x 4,35 x 100
c = 1 x 435
c = 435