471/709 x 49/57 + 471/709 x 8/57
tính giá trị của biểu thức
125,6 + 45,7 : 25 x 5
7\8 x 4\7 + 8\9 : 4\3
tính cánh thuận tiện
6,9 x 135 - 6,9 x 65 + 6.9 x 30
471 \709 x 44\57 + 471\100 x 8\57 + 471\100 x 5\57
sao chả có ai giải bài hộ bạn thế bạn giải giúp mik với đang cần gấp
Tính bằng cách thuận tiện nhất:
471 + 43 + 29 + 57
= ( 471 + ) + ( + 57)
= + 100
=
`@` `\text {Ans}`
`\downarrow`
`471 + 43 + 29 + 57`
`= (471 + 29) + (43+57)`
`= 500 + 100`
`= 600`
471+43+29+57
= (471+29)+(43+57)
=500+100
=600
Chúc bn hok tốt!!!
Tính nhanh: 471/709x49/57+471/709x8/57
Mọi người giúp mình với ạ!
\(\frac{471}{709}\cdot\frac{49}{57}+\frac{471}{709}\cdot\frac{8}{57}\)
\(=\frac{471}{709}\left(\frac{49}{57}+\frac{8}{57}\right)\)
\(=\frac{471}{709}\cdot1=\frac{471}{709}\)
1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 + 999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999444444444444445555555565546553757564653447\477+7\67\57\7457575745475\4\47\4\49\4\471
ko làm được thì kết bạn nha
khỏi làm cho khỏe chớ,câu này dài quá viết mỏi tay thì đăng làm gì cho mỏi tay theo mik thì đừng bn nào trả lời vẫn hơn
= 11000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
tìm x : 709 + x - 1576 = 6017
709+x=6017+1576
709+x=7593
x=7593-709
x=6884
cho cj nha.Cj lớp 4
709 + x - 1576 = 6017
709 + x = 6017 + 1576
709 + x = 7593
x = 7593 - 709
x = 6884
Tìm X : 709 + x - 1576 = 60175
709 + x - 1576 = 60175
709 + x = 60175 + 1576
709 + x = 61751
x = 61751 - 709
x = 61042
vậy x = ...
709 + x - 1576 = 60175
709 + x = 60175 + 1567
709 + x = 61742
x = 61742 - 709
x = 61033
\(709+x-1576=60175\\ 709+x=60175+1576\\ 709+x=61751\\ x=61751-709\\ x=61042\)
Rút gọn biểu thức
x - 57 - [(49 + x) - ( 57 - x ) ]
\(x-57-\left[\left(49+x\right)-\left(57-x\right)\right]=x-57-\left(49+x-57+x\right)=x-57-\left(2x-8\right)=x-57-2x+8=-x-49\)
a) 643 709 + 405 642 b) 3 214 x 56
1 657 480 - 821 730 231 438 : 34
\(\dfrac{x-7}{2010}\)+\(\dfrac{x-604}{471}\)+\(\dfrac{x-2}{403}\)=9
\(\dfrac{x-7}{2010}+\dfrac{x-604}{471}+\dfrac{x-2}{403}=9\)
\(\Leftrightarrow\dfrac{x-7}{2010}-1+\dfrac{x-604}{417}-3+\dfrac{x-2}{403}-5=0\)
\(\Leftrightarrow\dfrac{x-2017}{2010}+\dfrac{x-2017}{471}+\dfrac{x-2017}{403}=0\)
\(\Leftrightarrow\left(x-2017\right)\left(\dfrac{1}{2010}+\dfrac{1}{471}+\dfrac{1}{403}\right)=0\)
Mà \(\dfrac{1}{2010}+\dfrac{1}{471}+\dfrac{1}{403}\ne0\)
\(\Rightarrow x-2017=0\Leftrightarrow x=2017\)