a, \(46-57+111\)

\(=-11+111\)

\(=100\)

\(16.40-8.20.2\)

\(=16.40-\left(2.20\right).8\)

\(=16.40-40.8\)

\(=40\left(16-8\right)=40.8=320\)

\(\dfrac{16^3.3^{10}+120.6^9}{4^6.3^{12}+6^{11}}=\dfrac{\left(2^4\right)^3.3^{10}+3.5.2^3.\left(2.3\right)^9}{\left(2^2\right)^6.3^{12}+\left(2.3\right)^{11}}\)

\(=\dfrac{2^{12}.3^{10}+3.5.2^3.2^9.3^9}{2^{12}.3^{12}+2^{11}.3^{11}}=\dfrac{2^{12}.3^{10}+5.2^{12}.3^{10}}{2^{12}.3^{12}+2^{11}.3^{11}}\)

\(=\dfrac{2^{12}.3^{10}\left(1+5\right)}{2^{11}.3^{11}.\left(2.3+1\right)}\)\(=\dfrac{2^{12}.3^{10}.6}{2^{11}.3^{11}.7}=\dfrac{2.2}{7}=\dfrac{4}{7}\)

ok con de

25

a)(-24)+6+10+24

=[(-24)+24]+(6+10)

=0+16

=16

b)[150-(216+184):8]

=[150-400:8]

=150-50

=100

a)(-24)+6+10+24=[(-24)+24]+(6+10)=0+16=16

a. ( 20-36 ) + 116 = 20-36+116 = 20 - ( 36 - 116 ) = 20 - (- 80 ) = 20 + 80 = 100

b. 16.20 - 8.10.2 = 16.20 - 8.20 = ( 16 - 8 ) . 20 = 8.20 = 160

c. 2 . ( -3)² + 4. ( -5 ) + 20

= 2.9 + ( - 20 ) + 20

= 18 + 0 = 18

ko thể tính nhanh mà cũng ko làm được

a: 86+357+14

=100+357

=457

b: \(3\cdot52-16:22\)

\(=156-\dfrac{8}{11}=\dfrac{1708}{11}\)

a)

-37 +14 +26+37=(-37+37)+(14+26)=30

b) =(-24+24)+(6+10)=16

c)=(-23+23)+(25+15)=40

d)=(-33+33)+(-50+60)=10

e)=(-209+209)+[-14+(-16)]=-30

1) ( - 37 ) + 14 + 26 + 37

= ( - 37 + 37 ) + 14 + 26

= 0 + 40

= 40

2) ( - 24 ) + 6 + 10 + 24

= ( - 24 + 24 ) + 6 + 10

= 0 + 16

= 16

3) 15 + 23 + ( - 25 ) + ( - 23 )

= ( 23 - 23 ) + ( 15 - 25 )

= 0 - 10

= - 10

4) 60 + 33 + ( - 50 ) + ( - 33 )

= ( 60 - 50 ) + ( 33 - 33 )

= 10 + 0

= 10

( - 16 ) + ( - 209 ) + ( - 14 ) + 209

= ( - 16 - 14 ) + ( - 209 + 209 )

= - 30 + 0

= - 30