[r]
Trang 1§¹i sè 7: KiÓm tra 15 phót ch¬ng I
C©u 1: (3®) Thùc hiÖn phÐp tÝnh:
a)
15
34+
7
21 + 3419−1
15
17 + 32 b)
1
2 1
3
1
2
21
4
c) 25 ( - 2,7) 0,4 d) 5 – 2 (−12 )2 e) (58)8:(38−1)6 g) | −30 |
h) |10 9
12−26
21
28|
C©u 2 (3®) T×m x, biÕt :
a) 5
6 + x =
1
3 b)
3
1 4 - x =
2 7
c)
9
5⋅¿
¿ x = −
27
10 d) 0,02: x =179 : 2
2 3
e) | x | + 0,139 = 3
C©u 3: (1®) So s¸nh: 2900 vµ 3600
§¹i sè 7: KiÓm tra 15 phót ch¬ng I
C©u 1: (3®) Thùc hiÖn phÐp tÝnh:
a)
34
43+
15
21 +
9
43−1
17
19 +
2
7 b)
1
4 1
1
1
4
21
2
c) 25 ( - 7,2) 0,4 d) 3 – 2 (−12 )2
e) (34)10:(14−1)8 g) | −2 0 |
h) |12−19
1
2|
C©u 2: (3®) T×m n biÕt :
a) 3
4 + n =
1
2 b)
3
10 - n =
2 5
Trang 2c)
5
3¿ n = −
25
6 d) 0,04 :n=229 : 1
2
3 e) | n | + 0,139 = 2
C©u 3: (1®) T×m x vµ y, biÕt r»ng: ( x – 3)6 + | y 2 -9| = 0.
a) 0,64 : x=3559 : 1 32
b) 216 + 35
53−1
21
23 + 57+ 18
53
c) (35)6:(25−1)4 d)
a) 7 – 2 (−12 )2 b) 3443+ 15
21 + 439 −11719 + 72 c) (34)10:(14−1)8 d) √81 + √8 2
+ 6 2
−|12−19
1
2||−(−20 )|
a) 7 – 2 (−12 )2
a) 0,08 : x=623 : 2 12
T×m gi¸ trÞ nhá nhÊt cña biÓu thøc: A = | x-12 | + | 2-x | .
Bµi 3: a) So s¸nh 2 900 vµ 3 600
Bµi 3: a) Chøng tá r»ng: 146 - 77⋮57
Bµi 1: TÝnh (mét c¸ch hîp lý nÕu cã thÓ)
a) 11 – 2 (−12 )2 b) 117 + 22
35 + 3312−12729 + 1335 c) (21
2)16:(12−3)14 d) √(−13)2 + √15 2
+ 8 2
−|−30| Bµi 2: T×m c¸c sè x,y,z biÕt:
a) 0,64 : x=3559 : 1 32
b) Bµi 3: a) Chøng tá r»ng: 146 - 77⋮57
Trang 3
a) 11 – 2 (−12 )2 b) 117 + 22
35 + 3312−12729 + 1335 c) (21
2)16:(12−3)14 d) | −30 |