Đề thi Học sinh giỏi môn Toán lớp 6 (Đề 2)

Chủ nhật - 10/03/2019 04:37
Đề thi Học sinh giỏi môn Toán lớp 6 (Đề 2) có đáp án kèm theo. Mời các bạn cùng tham khảo.

Bài 1. Tính:

a) 1 + 3 + 5 + … + 2011 + 2013
de kiem tra hoc sinh gioi toan 6 de 3 1

Bài 2. Tìm x, biết:

a) 5(x + 4) – 3(x – 2) = x

b) | x + 4 | = 20 + 12003

Bài 3.
Đề kiểm tra Toán 6 | Đề thi Toán 6




a) Tìm số tự nhiên nhỏ nhất khác 5 khi chia số đó cho 140; 700; 350 có cùng số dư là 5

Bài 4. Trên tia Ox lấy hai điểm A, B sao cho OA = 5 cm, AB = 2 cm. Tính OB.

Bài 5. Cho góc xOy, Oz là phân giác của góc xOy, Ot là phân giác của góc xOz.
a) Tính số đo góc xOt biết ∠xOy=120o

b) Tìm giá trị lớn nhất của góc xOt

ĐÁP ÁN

Bài 1. a) 1004004

Đề kiểm tra Toán 6 | Đề thi Toán 6









Bài 2.

a)5(x + 4) – 3(x – 2) = x

5x + 20 – 3x + 6 = x

2x + 26 = x

2x – x = -26

x= - 26

Đề kiểm tra Toán 6 | Đề thi Toán 6








Bài 3.

a) Gọi số cần tìm là n

n – 5 là bội chung nhỏ nhất của 140, 700, 350

BCNN (140, 700, 350) = 700; n – 5 =700 ; n = 705

Đề kiểm tra Toán 6 | Đề thi Toán 6











Bài 4. OB = 3 cm hoặc OB = 7 cm

Bài 5.a) ∠xOt =60o

b) ∠xOt lớn nhất là 90o

  Ý kiến bạn đọc

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