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NGUYỄN THÀNH TRUNG
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2024-10-24 20:15:23
Chu vi mảnh vườn là:
(5,5+3,75).2=18,5(m)
Số khóm hoa cần trồng là:
18,5:1/4=74(khóm hoa)
Đs:74 khóm hoa
2024-10-24 20:04:14
A,1/5+4/5:x=0,75
4/5:x=0,75-1/5
4/5:x=15/20-4/20
4/5:x=11/20
x=11/20.4/5
x=11/25
Vậy x=11/25
B,x+1/2=1-x
x+1/2+x=1
x+x=1-1/2
2x=1-1/2
2x=1/2
x=1/4
Vậy x=1/4
2024-10-21 19:35:49
=2/3.2/3-5/4.3/4
=4/9-15/16
=64/144-135/144
=-71/144
2024-10-21 19:35:49
A=2/3.2/3-5/4.3/4
=4/9-15/16
=64/144-135/144
=-71/144
B=2/1.(-9/4)-7/2
=(-9/2)-7/2
=(-16/2)
=(-8)
C=(-3/4).68/13-75/100.36/13
=(-3/4).75/100-68/13.36/13
=(-3/4).3/4-2448/169
=(-9/16)-2448/169
=-15,0477071