307 283 / 100 = ?
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
(103.307-721)/(100.307+200)=(100.307+921-721)/(100.307+200)=(100.307+200)/(100.307+200)=1
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) Sai
c) Đúng
e) Sai
b) Đúng
d) Sai
g) Đúng
chúc bn hok tốt ~
![](https://rs.olm.vn/images/avt/0.png?1311)
D=|-347|+(-40)+3150+(-307)
=347-40+3150-307=3150
R =|-129|-119+|2-31|
=129-119+31-2=39
![](https://rs.olm.vn/images/avt/0.png?1311)
a: -23-12=-(23+12)=-35
a: -100-12=-(100+12)=-112
a: -123-20=-(123+20)=-143
a: 43-(-53)=43+53=96
a: 14-(-20)=14+20=34
a: -15-(-17)=-15+17=17-15=2
a: 143-(-123)=143+123=266
b: 12-(5-7)=12-(-2)=12+2=14
b: 15-(-9)-4=11+9=20
b: -17-(8-25)=-17-8+25=-25+25=0
b: -5+10-12-5=(10-5-5)-12=0-12=-12
b: (1456+23)-1456=1456-1456+23=0+23=23
b: (2354-45)-2354=2354-45-2354=-45
b: -2021-(57-2021)=-2021-57+2021=-57
c: 283+581-282-531=(283-282)+(581-531)=50+1=51
c: 3758+57-3769-66
=(3758-3769)+(57-66)
=(-11)+(-9)
=-(11+9)
=-20
c: 2575+37-2575+29
=37+29
=66
c: 17+33+(-37)+(-33)
=(17-37)+(33-33)
=0+(-20)
=-20
c: -4+(-10)+25+(-11)
=(-4-10-11)+25
=25-25
=0
c: 42-69+17+(-42)-17
=(42-42)+(17-17)+(-69)
=-69
c: (-2)+(-370)+(-8)+370
=(-2-8)+(-370+370)
=-10+0
=-10
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Giải:
\(A=\left[\left(-8\right)+\left(-7\right)\right]+\left(-10\right)=\left(-15\right)+\left(-10\right)=\left(-25\right)\)
\(B=-\left(-299\right)+\left(-219\right)+\left(-401\right)+12=299-219-401+12=-309\)
\(C=555+\left(-100\right)+\left(-80\right)+\left|-333\right|=555-100-80+333=708\)
\(D=\left|-347\right|+\left(-40\right)+3150+\left(-307\right)=347-40+3150-307=2456\)
\(E=98.42-\left\{50.\left[\left(18-2^3\right):2+3^2\right]\right\}\)
\(E=4116-\left\{50.\left[\left(18-8\right):2+9\right]\right\}\)
\(E=4116-\left\{50.\left[10:2+9\right]\right\}\)
\(E=4116-\left\{50.\left[5+9\right]\right\}\)
\(E=4116-\left\{50.14\right\}\)
\(E=4116-700\)
\(E=3416\)
\(F=-80-\left[-130-\left(12-4^2\right)\right]+2008^0\)
\(F=-80-\left[-130-\left(12-16\right)\right]+1\)
\(F=-80-\left[-130-\left(-4\right)\right]+1\)
\(F=-80-\left(-126\right)+1\)
\(F=47\)
\(G=1000+\left(-670\right)+297+\left(-330\right)=1000-670+297-330=297\)
\(H=1024:2^4+140:\left(38+2^5\right)-7^{23}:7^{21}\)
\(H=2^{10}:2^4+140:\left(38+32\right)-7^2\)
\(H=2^6+140:70-49\)
\(H=64+2-49\)
\(H=17\)
\(I=\left|-129\right|-119+\left|2-31\right|=129-119+\left|-29\right|=10+29=39\)
\(K=219+573+381-173\)
\(K=\left(219+381\right)+\left(573-173\right)\)
\(K=600+400\)
\(K=1000\)
\(L=36.33-105.11+22.15\)
\(L=36.33-35.3.11+11.2.3.5\)
\(L=36.33-35.33+33.10\)
\(L=33.\left(36-35+10\right)\)
\(L=33.11\)
\(L=363\)
\(N=160-\left(2^3.5^2-6.25\right)\)
\(N=160-\left[25.\left(8-6\right)\right]\)
\(N=160-\left[25.2\right]\)
\(N=160-50\)
\(N=110\)
\(O=\left(44.52.60\right):\left(11.13.15\right)=137280:2145=64\)
\(P=\left(2^{17}+15^4\right).\left(3^9-2^{17}\right).\left(2^4-4^2\right)=\left(2^{17}+15^4\right).\left(3^9-2^{17}\right).0=0\)
\(Q=100+98+96+...+4+2-97-95-...-3-1\)
\(Q=100+\left(98-97\right)+\left(96-95\right)+...+\left(4-3\right)+\left(2-1\right)\)
\(Q=100+1+1+...+1+1\)
Vì có 98:2=49 số 1
\(\Rightarrow Q=100+49\)
\(Q=149\)
TL :
3072,83
_HT_
trả lời :
= 3072,83
^HT^