27.77+24.27-27
27.77+24.27-27
174:{2[36+(4^2-23)]}
3^2.4-[30-(5-2)^2]
\(27.77+24.27-27\)
\(=27.\left(77+24-1\right)\)
\(=27.100\)
\(=2700\)
\(174\div\left\{2\left[36+\left(4^2-23\right)\right]\right\}\)
\(=174\div\left\{2\left[36+\left(16-23\right)\right]\right\}\)
\(=174\div\left\{2\left[36+\left(-7\right)\right]\right\}\)
\(=174\div\left\{2.29\right\}\)
\(=174\div58\)
\(=3\)
\(3^2.4-\left[30-\left(5-2\right)^2\right]\)
\(=9.4-\left[30-3^2\right]\)
\(=36-\left[30-9\right]\)
\(=36-21\)
\(=15\)
Bài 1: Thực hiện phép tính :
a. 27.77+24.27-27
b. (-12)+(-9)+121+|-20|
c. 2 mũ 5 . 101 - 2 mũ 5 . 101 mũ 0
a)27*77+24*27-27=27*(77+24-1)=27*100=2700
b)(-12)+(-9)+121+|-20|=-21+121+20=100+20=120
c)25*101-25*1010=25*101-25*1=25*(101-1)=32*100=3200
thực hiện phép tính (tính nhanh nếu có thể )
a)17.85+15.17-120
b)27.77+24.27-27
c)2 mũ 3 .17- 2 mũ 3 .14
d)35.48 +65.68 +20.35
cần gấp giu mình nhanh chóng mik cảm ơn
a: =17x100-120=1700-120=1580
a) \(17\cdot85+15\cdot17-120\)
\(=17\cdot\left(85+15\right)-120\)
\(=17\cdot100-120\)
\(=1700-120\)
\(=1580\)
b) \(27\cdot77+24\cdot27-27\)
\(=27\cdot\left(77+24-1\right)\)
\(=27\cdot100\)
\(=2700\)
c) \(2^3\cdot17-2^3\cdot14\)
\(=8\cdot17-8\cdot14\)
\(=8\cdot\left(17-14\right)\)
\(=8\cdot3\)
\(=24\)
b1:tính nhanh
a)17.13+17.42-17.35=
b)[25.(18-4^2)-10]:4+6=
c)3^6:3^2+2^3.2^2-3^2.3=
d)B=3.4^2-2^2.3=
e)2022^0+3.[5^2.10-[23-13]^2]=
g)27.77+24.27-27h)5.2^3+7^9:7^7-1^2020=
i)120:{54[50:2+(3^2-2.4)]}
giúp mik với nha
a) 17.13+17.42-17.35
=17.(13+42-35)
=17.20=340
b) [25.(18-42)-10]:4+6
=(25.2-10):4+6
=40:4+6=16
c) 36:32+23.22-32.3
=34+25-33
=81+32-27=86
d) B=3.42-22.3
=3.(16-4)
=3.12=36
e)20220+3.[52.10-(23-13)2]
=1+3.(250-100)
=1+450=451
g) 27.77+24.27-27
=27.(77+24-1)
=27.100=2700
h) 5.23+79:77-12020
=40+72-1
=89-1=88
i) 120:{54[50:2+(32-2.4)]}
=120:[54(25+1)]
=120:1404=10/117
Tính nhanh
27.77+24.77-27
a) 27.77+24.27-27
= 27.77+24.27-27.1
= 27.(77+24-1)
=27.
chúc bạn học tốt
27 . 77 + 77 - 27
= ( 27 - 27 ) .77 + 24
= 0 . 77 + 24
= 0 + 24
= 24
-27.77-54.11-27 Giải hộ mình với cần gấp lắm ạ !
\(-27.77-54.11-27\\ =27.\left(-77\right)-27.22-27.1\\ =27.\left(-77-22-1\right)\\ =27.\left(-100\right)\\ =-2700\)
2/3.7 - 2/7.9-2/7.11-...-2/24.27-1/27
Tính hợp lí
1)69.24+69.120+144.31
2)95.103-95.2-95
3)95.103-95.2-95
4)47.62+31.106
5) 54.12+27.77-27
6) 49+215+51+83+85
1)69.24+69.120+144.31
= 69. (24+120) + 144.31
= 144.69 + 144.31
= 144. (69+31)
= 144.100
=14 400
2)95.103-95.2-95
= 95. (103-2-1)
= 95.100
= 9 500
4)47.62+31.106
= 47. 62+ (31.2). 53
= 47.62 + 62. 53
= 62. (47+53)
= 62.100
= 6 200
5) 54.12+27.77-27
= 27. (2.12) + 27.77 - 27.1
= 27. 24 + 27.77 - 27.1
= 27. (24+77-1)
= 27. 100
= 2 700
6) 49+215+51+83+85
= (49+51) + (215+85)+ 83
= 100 +300 + 83
= 483
A=24.27n