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\(a.23.\left(75+25\right)+127.100\)
\(23.100+127.100\)
\(100.\left(127+23\right)\)
\(100.150\)
\(15000\)
\(b.\left(20+30\right)+\left(21+29\right)+22\)
\(50+50+22\)
\(100+22=122\)
\(23.75+25+23+127.100\)
\(=1725+25+23+12700\)
\(=1750+23+12700\)
\(=1773+12700\)
\(=14473\)
\(20+21+22+29+30\)
\(=\left(20+30\right)+\left(21+29\right)+22\)
\(=50+50+22\)
\(=50.2+22\)
\(=100+22\)
\(=122\)
a) (-124) + 24 = -100
b) 37. 78 + 37. 22
= 37 . ( 78 + 22 )
= 37 . 100
= 3700
e: =5/7(5/11+2/11-14/11)
=5/7(-7/11)=-5/11
f: =-5/4(2/11+9/11)+1+3/4
=-5/4+7/4
=2/4=1/2
g: =-5/7(3/13+10/13)+1+5/7
=-5/7+1+5/7
=1
h: =7/4(29/5-9/5)+41/13
=-7+41/13=-50/13
\(27^{11}>81^8;625^5< 125^7;5^{36}>11^{24};5^{28}< 26^{14}\)
Hok tốt
464 + 38 + 536 + 162 + 250
= ( 464 + 536 ) + ( 38 + 162 ) + 250
= 1000 + 200 + 250
= 1450
\(2^9\div16^2+81^5\div3^{18}-125^7\div625^5\)
\(=2^9\div\left(2^4\right)^{^2}+\left(3^4\right)^{^5}\div3^{18}-\left(5^3\right)^{^7}\div\left(5^4\right)^{^5}\)
\(=2^9\div2^8+3^{20}\div3^{18}-5^{21}\div5^{20}\)
\(=2^1+3^2-5^1\)
\(=2+9-5\)
\(=6\)