Tinh nhanh [28.54+56.36]:21:2 [5.4/11-3.16/5]:4/10 36.33-105.11+22-15
1) 33.18+72.42 - 41.18
2) (56.46 - 25.23 ) : 23
3) (76 . 34 - 19 .64 ) : (38.9)
4) (5.411 - 3. 165 ) : 410
5) ( 28.54 + 56.36 ) :21:2
Tính nhanh nếu có thể
1)
33 . 18 + 72 . 42 - 41 . 18
= 33 . 18 + 18 . 43 - 41 . 18
= 18 . ( 33 + 43 - 41 )
= 18 . 50
= 900
2) ( 56 . 46 - 25 . 23 ) : 23
= ( 112 . 23 - 25 . 23 ) : 23
= ( 112 - 25 ) . 23 : 23
= 87 . 23 : 23
= 87
3) ( 76 . 34 - 19 . 64 ) : ( 38 . 9 )
= ( 19 . 136 - 19 . 64 ) : ( 19 . 18 )
= 19 . ( 136 - 64 ) : ( 19 . 18 )
= 19 . 72 : 19 . 18
= 19 . 4
= 76
4) ( 5 . 411 - 3 . 165 ) : 410
= ( 5 . 411 - 3 . 410 ) : 410
= ( 20 . 410 - 3 . 410 ) : 410
= ( 20 - 3 ) . 410 : 410
= 17
bài 1: thực hiện phép tính: (tính nhanh nếu có thể)
a,347.2^2.9(216+184):8
b,132-Ơ116-(132-128)^2}
c,16:{400:[200-(37+46.3)]}
d,{184:[96-124:31]-2}.3651
e,46-[(16+71.4):15]-2
f,3^3.18+72.4^2-41.18
g,(56.46-25.23):23
h,(28.54+56.36):21:2
i,(76.34-19.64):(38.9)
k,(2+4+6+...+100).(36.333-108.111)
m,(5.4^11-3.16^5):4^10
n,7256.4375-725
______________
3650+4375.7255
a: \(=347\cdot4\cdot9\cdot400:8=347\cdot36\cdot50=624600\)
c: \(=16:\left\{400:\left[200-37-138\right]\right\}\)
\(=16:\left\{400:25\right\}=16:16=1\)
e: \(=46-\left[300:15\right]-2=46-20-2=24\)
1/ 33.18+72.42-41.18 4/ (2+4+6+......+100).(36.333-108.111)
2/ (56.46-25.23):23 5/ (5.411-3.165):410
3/ (28.54+56.36):21:2
3^3.18+72.4^2-41.18=27.18+18.64-41.18=18(27+64-41)=18.50=900
(56.46-25.23);23=(112.23-25.23):23=87.23:23=87
(28.54+56.36):21:2=(28.54+28.72):21:2=28.126:21:2=(28:2).(126:21)=14.6=84
(2+4+6+....+100)(36.333-108.111)=(2+4+6+100)(108.111-108.111)=0
(5.4^11-3.16^5):4^10=(5.4^11-3.4^10):4^10=5.4-3=17
(5.4^11-3.16^5):4^10=
=( 5 . 4 ^11 - 3. 4^2.5 ) : 4^10
= ( 5 . 4^11 - 3 . 4^10 ) : 4^10
= 4^10 ( 5.4 - 3 ) : 4^10
= 5.4 - 3
= 17
ĐÚng cho mình nha
(5.4^11-3.16^5):4^10=
5.411-3.4.45):410
=( 5 . 4 ^11 - 3. 4^2.5 ) : 4^10
= ( 5 . 4^11 - 3 . 4^10 ) : 4^10
= 4^10 ( 5.4 - 3 ) : 4^10
= 5.4 - 3
= 17
ĐÚng cho mình nha
có thể viết rõ hơn ko mình ko hiểu
36.33-105.11+22.15
36.33-105.11+22.15
=1188-1155+330
=33+330
=363
\(36\cdot33-105\cdot11+22\cdot15\)
\(=11\cdot\left(36\cdot3-105+2\cdot15\right)\)
\(=11\cdot\left(108-105+30\right)\)
\(=11\cdot33\)
\(=33\cdot\left(10+1\right)\)
\(=330+33\)
\(=363\)
Tính
(5.411-3.165):410
\(\left(5.4^{11}-3.16^5\right):4^{10}=\left(5.4^{11}-3.4^{10}\right):4^{10}\)
\(=5.4^{11}:4^{10}-3.4^{10}:4^{10}\)
\(=\frac{5.4^{11}}{4^{10}}-\frac{3.4^{10}}{4^{10}}=5.4-3=20-3\)
\(=17\)
(5.411 - 3.165) : 410
= 5.411:410 - 3.165:410
= 5 .(411:410) - 3. (42)5 : 410
= 5. 4 - 3. (410 : 410)
= 20 - 3.1
= 20 - 3
= 17
Chúc bn học tốt!!!
\(\left(5.4^{11}-3.16^5\right)\div4^{10}\)
(5*411-3*165):410
=[5*(22)11-3*(24)5)]:(22)10
=[5*222-3*220]:220
=[5*22*220-3*220]:220
=[20*220-3*220]:220
=220[20-3]:220
=17
(5.411-3.165) : 410 = 17 nha Trần Quỳnh Mai
\(\left(5.4^{11}-3.16^5\right):4^{10}=17\)
nha bạn ^_^
Trần Quỳnh Mai