92x40+61x92-92 = bài tính nhanh
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)
( 81 x 70 - 2013 ) x ( 92 x 86 - 46 x 172 )
=( 5670 -2013 ) x ( 7912 - 7912 )
=3657 x 0
= 0
( 81 × 70 - 2013 ) × ( 92 × 86 - 46 × 172 )
= ( 5670 - 2013 ) × ( 7912 - 7912 )
= 3675 × 0
= 0
Chúc bạn học giỏi nha !!!
![](https://rs.olm.vn/images/avt/0.png?1311)
\(M=\frac{8}{3}\times\frac{2}{3}\times\frac{3}{8}\times10\times\frac{19}{92}\)
\(=\frac{8}{3}\times\frac{3}{8}\times\frac{2}{5}\times10\times\frac{19}{92}\)
\(=4\times\frac{19}{92}\)
\(=\frac{19}{23}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 38 . (72 + 48) . 62 . (74 + 46)
=38 . 120 . 62 . 120
= 120 . (62 + 38)
= 120 . 100
= 12 000
b) 92 . (278 - 68) : (70 . 92)
=92 . 210 : 70 . 92
= \(\frac{92.210}{70.92}\)
=\(\frac{210}{70}\)= 3
kích mình nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
\(=\frac{-\frac{1}{9}+1-\frac{2}{10}+1-\frac{3}{11}+1-...-\frac{92}{100}+1}{\frac{1}{9}+\frac{1}{10}+...+\frac{1}{100}}\)
\(=\frac{\frac{8}{9}+\frac{8}{10}+\frac{8}{11}+...+\frac{8}{100}}{\frac{1}{9}+\frac{1}{10}+...+\frac{1}{100}}\)
\(=\frac{8\left(\frac{1}{9}+\frac{1}{10}+\frac{1}{11}+...+\frac{1}{100}\right)}{\frac{1}{9}+\frac{1}{10}+\frac{1}{11}+...+\frac{1}{100}}\)
= 8
![](https://rs.olm.vn/images/avt/0.png?1311)
36.(-54)+92.(-18)
=36.(-54)+(2.46).(-18)
=36.(-54)+(-46).36
=36.[(-54)+(-46)]
=36.(-100)
=-3600
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có 46 x 128 + 92 x 36 =46 x 128 +(2x46) x 36
=46 x 128 +46x72
=46x(128+72)= 46x200=9200
\(\text{46 x 128 + 92 x 36}\)
= \(\text{46 . 128 +( 2 . 46 ) . 36}\)
= \(\text{46 . 128 +46. ( 36 . 2 ) }\)
\(\text{= 46 . 128 + 46 . 72 }\)
= \(46\left(72+128\right)\)
= \(46.200\)
= \(9200\)
92 x 40 + 61 x 92 - 92
= 92 x ( 40 + 61 -1)
= 92 x (40 + 60)
= 92 x 100
= 9200