5.5+56.78
K
Khách
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Những câu hỏi liên quan
F
17 tháng 3 2017
y:8+yx8-56,78=69,11x2
y:8+yx8-56,78=138,22
y:8+yx8=138,22+56,78
y:8+yx8=195
chịu
CHÚC BẠN HỌC GIỎI
TK MÌNH NHÉ
23 tháng 3 2017
y : 8 + y x 8 - 56.78 = 69.11 x 2
y : 8 + y x 8 - 56.78 = 138.22
y : 8 + y x 8 = 138.22 + 56.78
y : 8 + y x 8 = 195
y x 0.125 + y x 8 = 195
y x ( 0.125 + 8 ) = 195
y x 8.125 = 195
y = 195 : 8.125
y = 24
HB
2
26 tháng 4 2018
a = 89,91
b =24,78913
c = không biết và minh nha kết bạn nữa
NT
4
DH
20 tháng 6 2017
a, \(6,3+\left(-3,7\right)+2,4+\left(-0,3\right)\)
\(=\left(6,3-0,3\right)+\left(-3,7+2,4\right)\)
\(=6-1,3=4,7\)
b, \(\left(-4,9\right)+5,5+4,9+\left(-5,5\right)\)
\(=\left(-4,9+4,9\right)+\left(5,5-5,5\right)\)
\(=0+0=0\)
Chúc bạn học tốt!!!
20 tháng 6 2017
a, 6.3+(-3.7)+2.4+(-0.3) = (6,3 - 0,3) + (-3,7+2,4) = 6 - 1,3 = 4,7
b, (-4.9)+5.5+4.9+(-5.5) = (-4,9 +4,9) + (-5,5 + 5,5) = 0 + 0 = 0
PT
4
Bài 5.5 ạ
28 tháng 6 2017
a;Zn + 2HCl\(\rightarrow\)ZnCl2+H2
Zn+ H2SO4\(\rightarrow\)ZnSO4+H2
b;TN1:
\(\sum n_{H_2}=0,1+0,1=0,2\left(mol\right)\)
VH2=22,4.0,2=4,48(lít)
TN2:
\(\sum n_{H_2}=0,1+0,05=0,15\left(mol\right)\)
VH2=22,4.0,15=3,36(lít)
Vậy ở TN1 sinh ra nhiều H2 hơn
LT
1
NN
5 tháng 9 2016
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height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300"><embed src="https://www.youtube.com/embed/vhcwrgVafCc?autoplay=1" width="400" height="300">
CD
1
VT
23 tháng 8 2016
a) 6,3 + (-3,7) + 2,4 + (-0,3)
= (6,3 + 2,4) + [-3,7 + (-0,3)]
= 8,7 + (-4)
= 4,7
b) (-4,9) + 5,5 + 4,9 + (-5,5)
= (-4,9 + 4,9) + [5,5 + (-5,5)]
= 0 + 0
= 0
c) 2,9 + 3,7 + (-4,2) + (-2,9) + 4,2
= [2,9 + (-2,9)] + (-4,2 + 4,2) + 3,7
= 0 + 0 + 3,7
= 3,7
d) (-6,5) . 2,8 + 2,8 . (-3,5)
= 2,8 . [-6,5 + (-3,5)]
= 2,8 . (-10)
= -28.
5 * 5 + 56 * 78
= 25 + 56 * 78
= 25 + 4368
= 4393
k nhé
\(5.5+56.78\)
\(=25+4368\)
\(=4393\)Đúng 100% luôn k mk nha