Ta có: \(7\cdot6^{10}\cdot2^{21}\cdot3^6-2^{19}\cdot6^{15}\)

\(=7\cdot3^{10}\cdot2^{10}\cdot2^{21}\cdot3^6-2^{19}\cdot3^{15}\cdot2^{15}\)

\(=7\cdot2^{31}\cdot3^{16}-2^{34}\cdot3^{15}\)

\(=2^{31}\cdot3^{15}\left(7\cdot3-2^3\right)=2^{31}\cdot3^{15}\cdot13\)

Ta có: \(9\cdot6^{15}\cdot2^{13}-4\cdot3^{15}\cdot2^{26}\)

\(=3^2\cdot3^{15}\cdot2^{15}\cdot2^{13}-2^2\cdot3^{15}\cdot2^{26}\)

\(=3^{17}\cdot2^{28}-3^{15}\cdot2^{28}=3^{15}\cdot2^{28}\left(3^2-1\right)=3^{15}\cdot2^{31}\)

Ta có: \(B=\frac{7\cdot6^{10}\cdot2^{21}\cdot3^6-2^{19}\cdot6^{15}}{9\cdot6^{15}\cdot2^{13}-4\cdot3^{15}\cdot2^{26}}\)

\(=\frac{2^{31}\cdot3^{15}\cdot13}{3^{15}\cdot2^{31}}=13\)

\(=>M=\dfrac{2^{28}.3^{18}.5-2^{29}.3^{20}}{2^{28}.3^{19}.5-2^{29}.3^{18}.7}\)

\(=\dfrac{2^{28}.3^{18}\left(5-2.3^2\right)}{2^{28}.3^{18}\left(3.5-2.7\right)}\)

\(=5-2.3^2\)

\(=5-2.9\)

\(=5-18\)

\(=-13\)

\(#Nzgoca\)

15x2+4x3=30+12=42

2x3x4x5x6x7x8x9=362880

15.2 + 4.3 = 30 + 12 = 42

2.3.4.5.6.7.8.9 = 362880

a: \(5^6:5^3+2^3:2^2\)

\(=5^3+2\)

=125+2

=127

b: \(3333:3+225:15\)

=1111+15

=1126

c: \(15\cdot2^3+4\cdot3^2-5\cdot7\)

\(=15\cdot8+4\cdot9-35\)

=120+36-35

=121

d: \(5\cdot4^2-18:3^2\)

\(=5\cdot16-18:9\)

=80-2=78

e: \(6^2:4\cdot3+2\cdot5^2\)

\(=36:4\cdot3+2\cdot25\)

=27+50

=77

f: \(80-\left(4\cdot5^2-3\cdot2^3\right)\)

=80-(100-24)

=80-76

=4

a) A = 110 - (-761) + 296 + 1454 - (-813 + 1077)

        = 110 + 761 + 296 + 1454 - 264

        = 871 + 1750 - 264

        = 2631 - 264

        = 2357

15.2³ + 4.3² - 5.7 = 121

15*2³+4*3²-5*7

=15*8+4*9-35

=120+36-35=120+(36-35)=120+1=121

\(15.2^3+4.3^2.5.7=1380\)

Ta có: \(\left(-\dfrac{3}{2}\right)^3+\dfrac{-49}{24}\cdot\dfrac{3}{14}-\left(\dfrac{5}{8}-\dfrac{27}{8}\right)\)

\(=\dfrac{-27}{8}+\dfrac{-7}{2}\cdot\dfrac{1}{8}-\dfrac{-22}{8}\)

\(=\dfrac{-27+22}{8}+\dfrac{-7}{16}\)

\(=\dfrac{-5}{8}+\dfrac{-7}{16}\)

\(=\dfrac{-10}{16}+\dfrac{-7}{16}\)

\(=\dfrac{-17}{16}\)

 A = 15.2³ + 4.3² - 5.7

=>  A = 15.8 + 4.9 - 5.7

=> A = 120 + 36 - 35

=> A = 156 - 35

=> A = 121

lấy máy tính đi