M= 7,2x 111 + 3,6 x 2 x 890 + 1,8 x 4 x 999
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 7,2 x 111 + 3,6 x 2 x 890 + 1,8 x 4 x 999
= 1,8 x 4 x 111 + 1,8 x 2 x 2 x 890 + 1,8 x 4 x 999
= 1,8 x 4 x 111 + 1,8 x 4 x 890 + 1,8 x 4 x 999
= 1,8 x 4 x ( 111 + 890 + 999 )
= 7,2 x 2000
= 14400
b) 36,5 x 9 + ( 30 + 6,5 )
= 36,5 x 9 + 36,5
= 36,5 x ( 9 + 1 )
= 36,5 x 10
= 365
![](https://rs.olm.vn/images/avt/0.png?1311)
= 7,2x111+(3,6x2)x890+(1,8x4)x999
= 7,2x111+7,2x890+7,2x999
= 7,2x(111+890+999)
= 7,2x2000
= 7,2x2x1000
= 14,4x1000
= 14400
![](https://rs.olm.vn/images/avt/0.png?1311)
(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2.................999 x 2 x 2 x 2 ?
A.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 > 999 x 2 x 2 x 2 = 9990 > 7992
B.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 < 999 x 2 x 2 x 2 = 9990 < 7992
C.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 = 999 x 2 x 2 x 2 = 9990 = 7992
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1:
a: =(172,56-72,56)-(35,32-5,32)+4,37-5,37
=100-30-1
=69
b: =7,2(111+890+999)
=7,2x2000
=14400
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,x:\left(111-99\right)=17\cdot5\\ \Leftrightarrow x:12=85\\ \Leftrightarrow x=1020\\ b,\left(509+335\right):x=840:35\\ \Leftrightarrow844:x=24\\ \Leftrightarrow x=\dfrac{211}{6}\\ c,\left(x+1\right)+\left(x+2\right)+...+\left(x+28\right)=462\\ \Leftrightarrow28x+406=462\\ \Leftrightarrow28x=56\\ \Leftrightarrow x=2\)
d, 890 : x = 35 dư 15
\(\Rightarrow35x+15=890\\ \Leftrightarrow35x=875\\ \Leftrightarrow x=25\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1:
a: =>x:5=6484
=>x=32420
b: =>x+23839=91834
=>x=67995
![](https://rs.olm.vn/images/avt/0.png?1311)
M=7,2 x 111 + 3,6 x 2 x 890 + 1,8 x 4 x 999
M= 1,8 x 4 x 111 + 1,8 x 2 x 2 x 890 + 1,8 x 4 x 999
M= 1,8 x 4 x 111 + 1,8 x 4 x 890 + 1,8 x 4 x 999
M= 1,8 x 4 x ( 111 + 890 + 999 )
M= 7,2 x 2000
M= 14400
M= 7,2 x 111 + 3,6 x 2 x 890 + 1,8 x 4 x 999
M= 7,2 x 111 + 7,2 x 890 + 7,2 x 999
M= 7,2 x ( 111 + 890+999)
M= 7,2 x 2000
M= 14400