Question

[phương anh]

bài 1: tìm x

a)x + 2,47 = 5,09

    8,23 - x = 4,56

b)tính nhanh

9,56 - 3,46 - 1,54

5,46 - ( 2,5 - 1,04 )

9,87 - ( 6,48 + 1,87)

7,52 - 3,61 + 2,09

Answer 1

[Phan Phúc Nguyên]

x+2,47=5,09

x=5,09-2,47

x=2,62

8,23-x=4,56

x=8,23-4,56

x=3,67

Answer 2

[NGUYỄN THU HÀ]

a) x + 2,47 = 5,09

x = 5,09 - 2,47

x = 2,62

8,23 - x = 4,56

x = 8,23 - 4,56

x = 3,67