Bài 1:Tính
a)85793 - 36841 + 3826
b)84/100 - 29/100 + 30/100
c)325,97 + 86,54 + 103,46
d)1/2+1/3+1/4+1/5
Giúp mk nha.Thanks!!!
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TT
5
BB
4 tháng 5 2018
\(\frac{84}{100}-\frac{29}{100}+\frac{30}{100}=\frac{85}{100}=\frac{17}{20}\)
85793-36841+3826=52778
325.97+86.54+103.46=515.97
24 tháng 5 2021
a) 85793 - 36841 + 3826 = 48952 + 3826 = 52778
b) \(\dfrac{84}{100}-\dfrac{29}{100}+\dfrac{30}{100}\) = \(\dfrac{55}{100}+\dfrac{30}{100}\) = \(\dfrac{85}{100}\) =\(\dfrac{17}{20}\)
c) 325,97 + 86,54 + 103,46 = 412,51 + 103,46 = 515,97
BD
3
6 tháng 4 2022
a.\(\dfrac{27}{8}\)
b.\(\dfrac{37}{40}\)
c.\(\dfrac{5}{2}\)
d.\(\dfrac{7}{3}\)
e.5
g.\(\dfrac{53}{16}\)
O
6 tháng 4 2022
Bài 1 :
a) \(\dfrac{3}{2}+\dfrac{5}{4}+\dfrac{5}{8}=\dfrac{12}{8}+\dfrac{10}{8}+\dfrac{5}{8}=\dfrac{12+10+5}{8}=\dfrac{27}{8}\)
b) \(\dfrac{4}{5}-\dfrac{3}{8}+\dfrac{2}{4}=\dfrac{32}{40}-\dfrac{15}{40}+\dfrac{20}{40}=\dfrac{32-15+20}{40}=\dfrac{37}{40}\)
c) \(3+\dfrac{6}{8}-\dfrac{5}{4}=\dfrac{3}{1}+\dfrac{6}{8}-\dfrac{5}{4}=\dfrac{24}{8}+\dfrac{6}{8}-\dfrac{10}{8}=\dfrac{20}{8}=\dfrac{5}{2}\)
d) \(\dfrac{5}{6}-\dfrac{1}{2}+2=\dfrac{5}{6}-\dfrac{1}{2}+\dfrac{2}{1}=\dfrac{5}{6}-\dfrac{3}{6}+\dfrac{12}{6}=\dfrac{14}{6}=\dfrac{7}{3}\)
e) \(\dfrac{3}{5}+\dfrac{6}{11}+\dfrac{7}{13}+\dfrac{2}{5}+\dfrac{16}{11}+\dfrac{19}{13}=\left(\dfrac{3}{5}+\dfrac{2}{5}\right)+\left(\dfrac{6}{11}+\dfrac{16}{11}\right)+\left(\dfrac{7}{13}+\dfrac{19}{13}\right)=1+2+2=5\)
g) \(\dfrac{75}{100}+\dfrac{18}{21}+\dfrac{29}{32}+\dfrac{1}{4}+\dfrac{3}{21}+\dfrac{13}{32}=\dfrac{3}{4}+\dfrac{6}{7}+\dfrac{29}{32}+\dfrac{1}{4}+\dfrac{1}{7}+\dfrac{13}{32}=\left(\dfrac{3}{4}+\dfrac{1}{4}\right)+\left(\dfrac{6}{7}+\dfrac{1}{7}\right)+\left(\dfrac{29}{32}+\dfrac{13}{32}\right)=1+1+\dfrac{21}{16}=2+\dfrac{21}{16}=\dfrac{53}{16}\)
GN
GV Nguyễn Trần Thành Đạt
Giáo viên
2 tháng 8 2023
bài 2 tìm x
a,106- ( x+ 7) =9
x+7 = 106 - 9
x+7 = 107
x= 107 - 7
x=100
b, 2 x ( x+ 4) + 5 =65
2 x (x+4) = 65 - 5
2 x (x+4) = 60
x+4 = 60:2
x+4= 30
x= 30 - 4
x=26
c, (16x x -32) x 45=0
16 x X - 32 = 0: 45
16 x X - 32 =0
16 x X = 0 + 32
16 x X = 32
X= 32:16
X=2
d, x+4 x x = 100 : 5
X + 4 x X = 20
(1+4) x X = 20
5 x X = 20
X= 20:5
X=4
4 tháng 4 2021
Bài 1:
a) \(\dfrac{65}{91}+\dfrac{-33}{55}=\dfrac{5}{7}+\dfrac{-3}{5}=\dfrac{25}{35}+\dfrac{-21}{35}=\dfrac{4}{35}\)
b) \(\dfrac{36}{-84}+\dfrac{100}{450}=\dfrac{-3}{7}+\dfrac{2}{9}=\dfrac{-27}{63}+\dfrac{14}{63}=\dfrac{-13}{63}\)
19 tháng 12 2023
a) 38% + 29% =67%
b) 89,5% - 22,36 %=67,14%
c) 84% : 12 -2% =7%-2%=5%
d) 84% : 12 -2%=7%-2%=5%
19 tháng 12 2023
a) 38% + 29%=67%
b) 89,5% - 22,36%=67,14%
c) 84% : 12 - 2%= 5%
d) kết quả giống con c
12 tháng 11 2021
c: \(=\dfrac{3}{2}\cdot1-1-20=\dfrac{3}{2}-21=\dfrac{-39}{2}\)
a)85793-36841+3826=62778
b)84/100-29/100+30/100=85/100=17/50
c)325,97+86,54+103,46=515,97
d)1/2+1/3+1/4+1/5=30+20+14+12/60=76/60=19/14
1/2+1/3+1/4+1/5
mơn trc nha!!!