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minhphuong2001
2 năm trước
Bài 1: Khoanh vào câu trả lời đúng: C1: Hiện nay tuổi mẹ gấp 10 lần tuổi con , sau 6 năm nữa tuổi mẹ gấp 4 lần tuổi con thì hiện nay tuổi con là: A. 2 tuổi B. 3 tuổi C. 4 tuổi D. 5 tuổi C2: Cho số tự nhiên lẻ có 2 chữ số là chia hết cho 5, gọi chữ số hàng chục là x. Nếu x viết xen chữ số 0 vào giữa 2 chữ số đó ta được 1 mới biểu diễn dưới dạng : A. 10x+5 B. 100x+5 C. 10x D. 100x C3: Cho tam giác ABC và tam giác DEF có A=D, B=E. Biết AC= 4cm, BC= 5cm =, DF= 3cm thì độ dài cạnh EF bằng: A. 3cm B. 3,25cm C. 3,5cm D. 3,75cm CÁC BẠN GIÚP MÌNH VỚI !!!
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