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Lê Minh Hiếu
Giới thiệu về bản thân
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Sửa thành: According to the syllabus, you can either write a paper or take an exam
57 - 40 = 17 ( tuổi )
Đáp số:.......................
10 - 10 : ( 20 - x ) = 8
0 : ( 20 - x) = 8
( 20 - x) = 0 : 8
( 20 - x) = 0
x = 20 - 0
Anh hơn Bình số bi là
6x2 = 12 (viên bi)
20 x 3 = 60 , 25 + 60 = 85 ok :))
Mảnh vải còn lại dài :
98 - 35 = 63 ( cm )
Mảnh vải còn lại dài hơn số mảnh vải đã cắt :
63 - 35 = 28 ( cm )
Đáp số 28 cm
Mảnh vải còn lại dài :
98 - 35 = 63 ( cm )
Mảnh vải còn lại dài hơn số mảnh vải đã cắt :
63 - 35 = 28 ( cm )
Đáp số:........
Số số hạng là :
(x - 10) + 1 = x - 9 (số hạng)
Tổng trên là :
(x + 10) . (x - 9) : 2 = 5106
=> (x + 10) . (x - 9) = 10212
=> (x + 10) . (x - 9) = 111 . 92
=> (x + 10) . (x - 9) = (101 + 10) . (101 - 9)
=> x = 101