Bonjour,
A=17 X 104
17 *100 + 10*4 + 7*4 =1 768
B=1001 X 36
1 000 * 30 + 1 000 *6+1*36 = 36 036
C=26 X 99
20 *100 + 6*100 - 26 = 2 574
D=4,7 X 2 + 4,7 X 8
(4,7) *(2+8)
4,7 * 10 = 47
E=75 X 27 + 3 X 75
75 * ( 27+3)
75 * 10 *3 = 750 * 3 = 2 250
F=34 X 121 - 34 X 21
34 * (121 -21) 34*100 = 3 400
bjr
A = 17 x 104 = 17 x (100 + 4) = 1700 + 17 x 4 = 1700 + 68 = 1768
B = 1001 x 36 = (1000 + 1) x 36 = 36000 + 36 = 36036
C = 26 x 99 = 26 x (100 - 1) = 2600 - 26 = 2574
D = 4,7 x 2 + 4,7 x 8 = 4,7 x (2 + 8) = 4,7 x 10 = 47
E = 75 x 27 + 3 x 75 = 75 x (27 + 3) = 75 x 30 = 2250
F = 34 x 121 - 34 x 21 = 34 x (121 - 21) = 34 x 100 = 3400