MQT1001 TN 1, devoir de mathématiques
Mémoire : MQT1001 TN 1, devoir de mathématiques. Recherche parmi 298 000+ dissertationsPar jibijaba • 16 Juillet 2017 • Mémoire • 1 025 Mots (5 Pages) • 757 Vues
Question 1 (10 POINTS)
a) 17 – 8 x 2 + 3 x 4
= 17 – (8 x 2) + (3 x 4)
= 17 – 16 + 12
= 13
b) 14 – 3 + 24 ÷ 3 x 2
= 14 – 3 + [(24 ÷ 3) x 2]
= 14 – 3 + (8 x 2)
= 14 – 3 + 16
= 27
c) (4 + 8) ÷ 2 + (13 – 3) x 5
= (12 ÷ 2) + (10 x 5)
= 6 + 50
= 56
d) – 72 + 14 x (–3)
= – 72 + [14 x (–3)]
= – 72 + (–42)
= – 114
e) – 21 + [(– 2 – 7) x 3 – (24 – 4) x 2]
= – 21 + (– 9 x 3) – (20 x 2)
= – 21 + (–27) – 40
= – 88
Question 2 (15 POINTS)
a) 235 000 – 34 000
62 000 + 34 000
1 – 38%
= 235 000 – 34 000
62 000 + 34 000
0,62
= 235 000 – 34 000
100 000 + 34 000
= 201 000
134 000
= 201
134
= 1 1
2
b) -12 - (-18) + 11 x 4
-5 + 45 ÷ (-9)
= [-12 - (-18)] 1+ (11 x 4)
-5 + [45 ÷ (-9)]
= 6 + 44
-5 + (-5)
= 50
-10
= -5
c) 88 000
1 + 1
3
= 88 000
1 + 0,333
= 88 000
1,333
= 88 000 ÷ 1,333
= 66 016.50
d) 64 000(2,4 – 1,3)
64 000(2,4 – 1,3) – 17 600
= 64 000(1,1)
64 000(1,1) – 17 600
= 70 400
70 400 – 17 600
= 70 400
52 800
= 704
528
= 2 1
3
e) [42 000 x 0,9 + 20 000 x 0,9] x 5,435 – [50 000 x 0,8 + 60 000 x 0,8]
= [(42 000 x 0,9) + (20 000 x 0,9)] x 5,435 – [(50 000 x 0,8) + (60 000 x 0,8)]
= (37 800 + 18 000) x 5,435 - (40 000 + 48 000)
= (55 800 x 5,435) – 88 000
= 303 273 – 88 000
= 215 273
QUESTION 3 (10 POINTS)
a) -3^4
= -3 x (-3) x (-3) x (-3)
= 81
b) (4^3)^2
= (4 x 4 x 4)^2
= 64^2
= 64 x 64
= 4096
c) 7^5 x 7^-4
= (7 x 7 x 7 x 7 x 7)
(7 x 7 x 7 x 7)
= 16 807
2401
= 7
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