3 giờ 126 phut viết bằng hỗn số là gì giúp mình nhé
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NN
1
AH
Akai Haruma
Giáo viên
31 tháng 10
Lời giải:
a. 2 giờ 40 phút = 2 giờ + $\frac{2}{3}$ giờ = $2\frac{2}{3}$ giờ
b. 1 giờ 45 phút = 1 giờ + $\frac{3}{4}$ giờ = $1\frac{3}{4}$ giờ
c. 85 phút = $\frac{85}{60}$ giờ = $1\frac{5}{12}$ giờ
3 tháng 2 2021
2\(\frac{1}{3}\) giờ = 140 phút
3\(\frac{1}{5}\) phút= 192 giây
7 tháng 11 2021
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4 tháng 5 2019
A, \(2\frac{2}{5}\left(\frac{1}{2}x-0,75\right)=\frac{3}{10}\)
\(=>\frac{2.5+2}{5}\left(\frac{1}{2}x-\frac{3}{4}\right)=\frac{3}{10}\)
\(=>\frac{1}{2}x-\frac{3}{4}=\frac{3}{10}:\frac{12}{5}=\frac{1}{8}\)
\(=>x=\left(\frac{1}{8}+\frac{3}{4}\right):\frac{1}{2}\)
\(=>x=\frac{7}{4}\)
B, \(\frac{3}{5}-|x-\frac{1}{2}|=25\%\)
\(=>|x-\frac{1}{2}|=\frac{3}{5}-\frac{1}{4}\)
\(=>|x-\frac{1}{2}|=\frac{7}{20}\)
\(=>x-\frac{1}{2}=\frac{7}{20};-\frac{7}{20}\)
TH1: \(x-\frac{1}{2}=\frac{7}{20}=>x=\frac{17}{20}\)
TH2: \(x-\frac{1}{2}=-\frac{7}{20}=>x=\frac{3}{20}\)
15 tháng 6 2017
Gọi số thứ nhất, hai , ba theo thứ tự đề bài là a, b và c.
Theo đề bài, ta có (a+b+c):3 = 126 ; a - b = 15 suy ra a = b+15 ; b - c =9 suy ra c = b - 9
Do đó \(\frac{a+b+c}{3}=126\Rightarrow b+15+b+b-9=378\Rightarrow3b=372\Rightarrow b=124\Rightarrow c=124-9=115\)
Vậy số thứ ba là 115
11 tháng 4 2018
có số con vịt trống là : 126 : ( 2 + 5) x 2 = 36 con
có số con vịt mái là : 126 - 36 = 90 con
đáp số tự viết nha bạn !
vịt trống : /___________/_____________/ 126 con vịt trống và mái
vịt mái : /___________/_____________/______________/_____________/_____________/
NT
6 tháng 5 2017
3 15/16 giờ= 3 giờ 56,25 phút
Nếu mình đúng thì k mình và gửi kết bạn nhé
30 tháng 3 2017
2007/135 = 14/13/15
126/27 = 4/2/3
17/12 = 1/5/12
311/39 = 7/38/39
30 tháng 3 2017
\(\frac{-2007}{135}=-14^{13}_{15}\)
\(\frac{-126}{27}=-4^2_3\)
\(\)
5 giờ 6 phần 60
\(3\frac{126}{100}\)
k mik nhé, bạn