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Nguyễn Yến Nhi
Giới thiệu về bản thân
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Bai 3.
A) cac tia Ax, AM, AC, AB, Az, Ay
B) AM, AC
Bai 3.
A) cac tia Ax, AM, AC, AB, Az, Ay
B) AM, AC
Bai 2 Giai
Sau khi giam gia , gia cua 1 quyen tap la:
7000-( 7000:10)=6300(dong)
So tien mua 15 quyen tap la:
6300X15= 94500( dong)
Vay : Ban an du tien mua 15quyen tap va con du 5500dong
A)= 1/2+1/3
= 5/6
B) =2/5+2/3
=16/15
C) =7/11x( 3/4+1/4)+4/11
=7/11x1+4/11
= 1
D) =( 3/4+1/2+1/4)x8/3
= 3/2x8/3
= 4
A) Vi diem M la trung diem cua doan thang AB
Suy ra $AM = MB =/dfrac{AB}2=/dfrac 42=2(cm)
B) Truong hop 1:
xMy=60
Truong hop 2:
xMy= 160
so hoc sinh gioi cua lop 6A la :
7/20. 40 = 14(hoc sinh)
so hoc sinh trung binh cua lop 6A la:
1/8 . 40 = 5 (hoc sinh)
so hoc sinh kha cua lop 6A la:
14 + 5 = 19 (hoc sinh)
so hoc sinh yeu cua lop 6A la :
40 -( 14 + 5 + 19) = 2 ( hoc sinh)
Vay 2 hoc sinh
A) 1/2 . 4/3 - 20/3 . 4/5
= 2/3 - 16/3
= -14/3
B) 3/7+ -6/19 +4/7 + -13/19
=( 3/7+4/7) + ( -6/19 +-13/19)
=7/7+ 19/19
=1+(-1)
=0
C) 3/5. 8/9 - 7/9 . 3/5 + 3/5 . 29/9
=3/5 . ( 8/9 - 7/9+ 29/9)
=3/5 . 27/9
=3/5.3
=9/5
A) 1/2 . 4/3 - 20/3 . 4/5
= 2/3 - 16/3
= -14/3
B) 3/7+ -6/19 +4/7 + -13/19
=( 3/7+4/7) + ( -6/19 +-13/19)
=7/7+ 19/19
=1+(-1)
=0
C) 3/5. 8/9 - 7/9 . 3/5 + 3/5 . 29/9
=3/5 . ( 8/9 - 7/9+ 29/9)
=3/5 . 27/9
=3/5.3
=9/5
A) 1/2 . 4/3 - 20/3 . 4/5
= 2/3 - 16/3
= -14/3
B) 3/7+ -6/19 +4/7 + -13/19
=( 3/7+4/7) + ( -6/19 +-13/19)
=7/7+ 19/19
=1+(-1)
=0
C) 3/5. 8/9 - 7/9 . 3/5 + 3/5 . 29/9
=3/5 . ( 8/9 - 7/9+ 29/9)
=3/5 . 27/9
=3/5.3
=9/5
A) 1/2 . 4/3 - 20/3 . 4/5
= 2/3 - 16/3
= -14/3
B) 3/7+ -6/19 +4/7 + -13/19
=( 3/7+4/7) + ( -6/19 +-13/19)
=7/7+ 19/19
=1+(-1)
=0
C) 3/5. 8/9 - 7/9 . 3/5 + 3/5 . 29/9
=3/5 . ( 8/9 - 7/9+ 29/9)
=3/5 . 27/9
=3/5.3
=9/5