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mk giải lun ạ
=63.(25+5.14+33)
=63.(25+70+33)
=63.128
=8064
\(63\cdot25+5\cdot63\cdot14+33\cdot63\)
\(=63\cdot25+70\cdot63+33\cdot63\)
\(=63\cdot\left(25+70+33\right)\)
\(=65\cdot128\)
\(=8320\)
\(a.\left(-83\right)+302+83\\ =\left(-83+83\right)+302\\ =0+302\\ =302\\ b.14.\left(-7\right)-216:2\\ =-98-108\\ =-206\\ c.56.\left(-32\right)+\left(-68\right).56\\ =56.\left[\left(-32\right)+\left(-68\right)\right]\\ =57.\left(-100\right)\\ =-5700\\ d.2^3-6.\left[25-\left(33-28\right)^2\right]\\ =8-6\left[25-5^2\right]\\ =8-6\left[25-25\right]\\ =8-6.0\\ =8-0\\ =8\\ e.15.\left(-6\right)-420:\left(-4\right)\\ =-90-\left(-105\right)\\ =-90+105\\ =15\)
\(f.63.\left(-52\right)+\left(-48\right).63\\ =63.\left[\left(-52\right)+\left(-48\right)\right]\\ =63.\left(-100\right)\\ =-6300\)
a) - ( -24 + 63 + 71 ) - ( 14 - 73 - 81 ) = 24 - 63 - 71 - 14 + 73 + 81 = 30
b) ( 25 + 38 + 12 ) + ( 2022 - 63 - 12 ) = 25 + 38 + 12 + 2022 - 63 - 12 = 2022
c) ( 97 + 43 - 15 ) - ( 87 + 33 - 25 ) = 97 + 43 - 15 - 87 - 33 + 25 = 30
d) 50 - ( 47 + 50 - 18 ) + ( 47 - 18 ) = 50 - 47 - 50 + 18 + 47 - 18 = 0
nha !
# Kukad'z Lee'z
Đọc tiếp...
a. \(27^{11}=\left(3^3\right)^{11}=3^{3\cdot11}=3^{33}\)
\(81^8=\left(3^4\right)^8=3^{4\cdot8}=3^{32}\)
Vì 32<33 => 332<333 => 818<2711
b. \(63^{15}=\left(63^5\right)^3=992436543^3\)
\(34^{18}=\left(34^6\right)^3=1544804416^3\)
Vì 992436543<1544804416 nên 9924365433<15448044163 => \(63^{15}< 34^{18}\)
\(-87.63+63.\left(-14\right)+63=63.\left(-87+\left(-14\right)+1\right)\)
\(=63.\left(-100\right)\)
\(=-6300\)
= -87*63+63*(-14)+63
= [(-87)+(-14)+1]*63
= (-100)*63
= -6300
a = 63.82.5.7.10
a = 23.33.26.5.7.2.5
a = 210.33.52.7
b = 45.63.5.14
b = 210. 23.33.5.2.7
b = 214.33.5.7
\(63\cdot25+5\cdot63+63\cdot14+63\cdot33\)
\(=63\cdot\left(15+5+14+33\right)\)
\(=63\cdot67\)
\(=4221\)
=63.(25+5+14+33)
=63.77=4851
Học tốt nhé!