Prénom :...…... Date :.……...
(06)
Pour effectuer une multiplication, il faut toujours commencer à effectuer les calculs par la DROITE…
Attention aux retenues !…
• Calcule en lignes :
51 x 3 = (50 + 1) x 3 = (50 x 3) + (1 x 3) = 150 + 3 = 153 46 x 4 = (40 + 6) x 4 = (40 x 4) + (6 x 4) = 160 + 24 = 184
93 x 5 = (90 + 5) x 5 = (90 x 5) + (3 x 5) = 450 + 15 = 465 76 x 2 = (70 + 6) x 2 = (70 x 2) + (6 x 2) = 140 + 12 = 152 84 x 3 = (80 + 4) x 3 = (80 x 3) + (4 x 3) = 240 + 12 = 252 78 x 4 = (70 + 8) x 4 = (70 x 4) + (8 x 4) = 280 + 32 = 312 61 x 5 = (60 + 1) x 5 = (60 x 5) + (1 x 5) = 300 + 5 = 305 72 x 3 = (70 + 2) x 3 = (70 x 3) + (2 x 3) = 210 + 6 = 216 59 x 5 = (50 + 9) x 5 = (50 x 5) + (9 x 5) = 250 + 45 = 295
43 x 6 = (40 + 3) x 6 = (40 x 6) + (3 x 6) = 240 + 18 = 258
• Calcule en colonnes : 5 1
x 3 1 5 1
24 6 x 4 1 8 4
19 3 x 5 4 6 5
17 6 x 2 1 5 2
2 0 x 5 1 0 0
18 6 x 2 1 7 2
18 4 x 3 2 5 2
37 8 x 4 3 1 2
6 1 x 5 3 0 5
7 2 x 3 2 1 6
29 6 x 4 3 8 4
37 7 x 5 3 8 5
23 6 x 4 1 4 4
5 0 x 5 2 5 0
36 9 x 4 2 7 6
2 1 x 4 8 4
9 1 x 2 1 8 2
6 0 x 5 3 0 0
14 3 x 6 2 5 8
41 9 x 5 9 5
58 8 x 7 6 1 6
7 0 x 9 6 3 0
9 1 x 8 7 2 8
32 4 x 9 2 1 6
