telephone16
A = 25 X 10 P3 = 25 000 B = -407 X 10 P -4 = - 0,407 C = 0,0328 X 10 P-² = 0,000328
Exercice 2 32154 = 321,54 X 10² 8,4 = 0,000084 X 10 P5 0,909 = 909 X 10 P -3 Exercice 3 B = 10 P-8 X 0,7 X 10 P-12 = 0,7 X 10 P -8 -12 = 0,7 X 10 P-20 = 0,7 X 10 P-20-3 21 X 10 P3 21 X 10 P3 21 X 10 P3 21 0,7 X 10 P-23 21 C = 54 X 10 P-1 -83 X 10 P-² = 54 -83 X 10 P-1 -2 = -29 X 10 P-3 +2 = -29 X 10 P -1 10 P-² 10 P -² résultat écriture décimale = -2,9 E = 3,5 X 10 P -11 X 2 X 10 P18 = 7 X 10 P -11 +18 = 7 X 10 P7 = 35 X 10 P 7+9 0,2 X 10P -9 0,2 X 10 P-9 0,2 X 10 P-9 = 35 X 10 P 16 = 3,5 X 10 P17
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A=25000 B= -0.407 C=0.000328
1/ 321.54x
B = -407 X 10 P -4 = - 0,407
C = 0,0328 X 10 P-² = 0,000328
Exercice 2
32154 = 321,54 X 10²
8,4 = 0,000084 X 10 P5
0,909 = 909 X 10 P -3
Exercice 3
B = 10 P-8 X 0,7 X 10 P-12 = 0,7 X 10 P -8 -12 = 0,7 X 10 P-20 = 0,7 X 10 P-20-3
21 X 10 P3 21 X 10 P3 21 X 10 P3 21
0,7 X 10 P-23
21
C = 54 X 10 P-1 -83 X 10 P-² = 54 -83 X 10 P-1 -2 = -29 X 10 P-3 +2 = -29 X 10 P -1
10 P-² 10 P -²
résultat écriture décimale = -2,9
E = 3,5 X 10 P -11 X 2 X 10 P18 = 7 X 10 P -11 +18 = 7 X 10 P7 = 35 X 10 P 7+9
0,2 X 10P -9 0,2 X 10 P-9 0,2 X 10 P-9
= 35 X 10 P 16 = 3,5 X 10 P17
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