
BÀI TẬP BIỂU THỨC
Authored by Lê Hưng
Mathematics, Education
8th Grade
Used 11+ times

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13 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Giá trị của biểu thức 3x2-4x3 tại x=2 là:
-20
20
15
-44
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Giá trị của biểu thức A= 5.(x-2)+3.(x-2) tại x=3 là:
8
7
9
6
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Giá trị của biểu thức A= 2.(x-7)-9.(x-7) là 7. Khi đó x=?
5
6
-6
-5
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Tính giá trị của biểu thức 5x2 – 2x tại x = 2
-3
7
10
16
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tính giá trị của biểu thức 3m - 2n tại m = -1 và n = 2
-5
5
7
1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình chữ nhật có hai cạnh là x, y. Chu vi hình chữ nhật tại x = 4, y = 7 là bao nhiêu ?
19
20
21
22
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Một tam giác vuông có hai cạnh góc vuông là x,y. Tính độ dài cạnh huyền của nó khi x = 6, y = 8.
10
11
12
9
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