quiz > Primaire > Maths

Les décomposition multiplicatives

1) La décomposition multiplicative permet de décomposer un nombre en une somme de multiplications.
2) 125 = (1 x 100) + (2 x 20) + 5
3) 548 = (54 x 10) + 8
4) 432 = (43 x 100) + 2
5) 630 = (6 x 100) + (3 x 10) = 63 x 100
6) 983 = (9 x 100) + (80 x 10) + 3
7) 249 = (2 x 100) + (4 x 10) + 9 = (24 x 10) + 9
8) 7.893 = ?
9) 6.496 = (6 x 1.000) + (4 x 100) + (9 x 10) + 6
10) 9.630 = (9 x 1.000) + (6 x 100) + (3 x 10)
11) (10 x 1.000) + (5 x 100) + (3 x 10) + 6 = ?
12) 25.563 = (25 x 10.000) + (5 x 100) + (6 x 10) + 3
13) (9 x 10.000) + (8 x 1.000) + (3 x 100) + 12 = 98.312
14) (7 x 1.000) + (8 x 100) + (7 x 10) + 4 = ?
15) 454 x 12 = (451 x 10) + (451 x 2) = 4.510 + 902 = 5.412
16) 736 x 24 = (736 x 20) + (736 x 4) = 14.720 + 2.944 = 17.664
17) 842 x 15 = ?
18) 510 x 22 = ?
19) 493 x 55 = ?
20) 493 x 41 = (493 x 40) + (493 x 1) = 19.720 + 493 = 20.213
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