![](https://rs.olm.vn/images/avt/0.png?1311)
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)
`a,`
`34,67+5,42+4,58`
`= 34,67+(5,42+4,58)=34,67+10=44,67`
`b,`
`15,27 \times 2 \times 0,5`
`= 15,27 \times (2 \times 0,5)`
`= 15,27 \times 1=15,27`
`c,`
`45,28 \times 45 + 45,28 \times 55`
`= 45,28 \times (45+55)`
`= 45,28 \times 100=4528`
a.
34,67 + 5,42 + 4,58
= (34,67 + 5,42) + 4,58= 40,09 + 4,58 = 44,67
b. 15,27 x 2 x 0.5
= (15,27 x 2) x 0.5 = 30,54 x 0,5 = 15,27
c. 45,28 x45 + 45,28 x 55
= 45,28 x (45 + 55)
= 45,28 x 100 = 4528
![](https://rs.olm.vn/images/avt/0.png?1311)
Tính bằng cách thuận tiện:
a) 15,27 - 4,18 - 2,09 = (15,27 - 4,18) - 2,09
= 13,09 - 2,09
= 11
b) 60 - 26,75 - 13,25 = 60 - (26,75 + 13,25)
= 60 - 40
= 20
c) [72,69 + 18,47] - [8,47 + 22,69] = 72,69 + 18,47 - 8,47 - 22,69
= (72,69 - 22,69) + (18,47 - 8,47)
= 50 + 10
Chúc học tốt!
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 15,27 - 4,18 - 2,09
= 15,27 - (4,18 + 2,09)
= 15,27 - 6,27
= 9
b) 60 - 26,75 - 13,25
= 60 - (26,75 + 13,25)
= 60 - 40
=20
![](https://rs.olm.vn/images/avt/0.png?1311)
\(=\left(1,27+14,77\right)+\left(2,77+13,27\right)+\left(4,27+11,77\right)+\left(5,77+10,77\right)+\left(7,27+8,77\right)\)
\(=16+16+16+16+16\)
\(=16\times5\)
\(=80\)
CHO XIN NHÉ
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 19/37 + (1 - 19/37)
= (19/37 - 19/37) + 1
= 0 + 1 = 1
b) 15,27 - 4,13 - 1,14
= 15,27 - ( 4,13 + 1,14)
= 15,27 - 5,27
= 10
c) 60 - 13,75 - 26,25
= 60 - ( 13,75 + 26,25)
= 60 - 40
= 20
![](https://rs.olm.vn/images/avt/0.png?1311)
8,24 +3,69+2,31=8,24+(3,69+2,31)
=8,24+6=14,24
15,27-4,18-2,09=15,27-(4,18+2,09)
=15,27-6,27=9
60-26,75-13,25=60-(26,75+13,25)
=60-40=20
38,25-18,25-13,25=38,25-(18,25+13,25)
=38,25-31,50=6,75
TICK CHO MÌNH NHA
15,27+23,98-4,27=15,27-4,27+23,98= 11+23,98= 34,98
\(15,27+23,98-4,27\)
\(=\left(15,27-4,27\right)+23,98\)
\(=11+23,98\)
\(=34,98\)
(Nhớ k cho mình với nhé!)