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a, \(\left[\left(-8\right)+\left(-7\right)+\left(-10\right)\right]\) = -25
b, 555-(-333)-100-80 = 555 + 333 - 100 - 80
= 888-100-80
= 788 - 80
= 708
c, -(-229) +(-219) - 401 +12 = 229 - 219 - 401 + 12
= 10 + 12 - 401
= 22 - 401
= -379
d, 300 - (-200) - (-120) + 18 = 300 + 200 + 120 +18
= 620 + 18
= 638
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
\(\Rightarrow Q=100+49\)
\(Q=149\)
a) [(-13) + (-15)] + (-8)
= -28 - 8
= -36
b) 500 – (-200) – 210 - 100
= 500 + 200 – 210 - 100
= (500 + 200) - (210 + 100)
= 700 - 310
= 390
c) –(-129) + (-119) - 301 + 12
= 129 + 12 – 119 - 301
= (129 + 12) - (119 + 301)
= 141 – 420
= -279
d) 777 – (-111) – (-222) + 20
= 777 + 111 + 222 + 20
= (777 + 111 + 222) + 20
= 1110 + 20
= 1130
a) \(\left[\left(-13\right)+\left(-15\right)\right]+\left(-8\right)\)
\(=\left(-28\right)+\left(-8\right)\)
\(=-36\)
b) \(500-\left(-200\right)-210-100\)
\(=500+200-210-100\)
\(=700-210-100\)
\(=490-100\)
\(=390\)
c) \(-\left(-129\right)+\left(-129\right)-301+12\)
\(=129+\left(-129\right)-301+12\)
\(=0-301+12\)
\(=\left(-301\right)+12\)
\(=-289\)
d) \(777-\left(-111\right)-\left(-222\right)+20\)
\(=777+111+222+20\)
\(=888+222+20\)
\(=1110+20\)
\(=1130\)
