\(=\dfrac{2^{12}\cdot3^4\left(3-1\right)}{2^{12}\cdot3^6}-\dfrac{5^{10}\cdot7^3\left(1-7\right)}{5^9\cdot7^3+5^9\cdot7^3\cdot2^3}\)

\(=\dfrac{-2}{9}-\dfrac{5\cdot\left(-6\right)}{9}=\dfrac{-2-5\cdot\left(-6\right)}{9}=\dfrac{-2+30}{9}=\dfrac{28}{9}\)

=a) (-75) + (-125)

= -200

b) 36 + (-82)

= -46

c) 27 . (-15) + (-15) . 73

= (-15) . (27 + 73)

= (-15) . 100

= -1500

d) 510 . (2 - 120) - 120 . (-510)

= 510 . 2 - 510 . 120 - 120 . (-510)

= 510 . 2 - [510 . 120 + 120 . (-510)]

= 510 . 2 - 0

= 1020

a, ( - 5 ) . ( - 7 ) . 4 . 20 . ( - 25 )

= -70000

 b, ( - 16 ) . 73 + ( - 16 ) . 27

= -1600

c, ( - 48 ) . 159 - ( - 48 ) . 59

= -4800

d , 72 . ( - 83 ) + ( - 72 ) . ( - 125 )

= 3014

e , ( - 81 ) . 125 - 181 . ( - 125 )

= 12500

#Hoctot

a -70000.0000 

b-1600.000000

c-4800.000000

d-4968.000000

e-12500.00000

a, 70000

b, 1600

c, 4800

d, 3014

e, 12500

\(\text{24) 15 (4-7)- 15 (5-3)}\)

\(=15.\left[\left(4-7\right)-\left(5-3\right)\right]\)

\(=15.\left[4-7-5+3\right]\)

\(=15.\left(-5\right)\)

\(=-75\)

\(\text{25) 73(8-59) -59(8-73)}\)

\(=73.8-73.59-59.8+59.73\)

\(=8\left(73-59\right)+59\left(-73+73\right)\)

\(=8.14+59.0\)

\(=112\)

24) 15 (4-7)- 15 (5-3)

=15. 4 − 7 − 5 − 3

= 15. 4 − 7 − 5 + 3

= 15. −5

= −75

25) 73(8-59) -59(8-73)

= 73.8 − 73.59 − 59.8 + 59.73

= 8 73 − 59 + 59 −73 + 73

= 8.14 + 59.0

= 112

15 (4-7)- 15 (5-3)

=15. 4 − 7 − 5 − 3

= 15. 4 − 7 − 5 + 3

= 15. −5

= −75

25) 73(8-59) -59(8-73)

= 73.8 − 73.59 − 59.8 + 59.73

= 8 73 − 59 + 59 −73 + 73

\(a.12\times125\times54\)

\(=1500\times54\)

\(=81000\)

\(b.64\times125\times54\)

\(=8000\times54\)

\(=432000\)

\(c.36\times\left[143+57\right]+64+\left(143+57\right)\)

\(=36\times200+64+200\)

\(=7200+64+200\)

\(=7264+200\)

\(=7464\)

a) =81000

b) 432000

c) 7464

d) 7414

e) 1427

cam on cac ban nhieu nhe lan sau co bai toan nho  giup do minh nhe ban

15 × (4 - 7) - 15 × (5 - 3)

= 15 × (-3) - 15 × 2

= 15 × (-3 - 2)

= -15 × 5 

= -75

--------

73 × (8 - 59) - 59 × (8 - 73)

= 73 × 8 - 73 × 59 - 59 × 8 + 59 × 73

= 8 × (73 - 59) + 73 × (59 - 59)

= 8 × 14 + 73 × 0

= 8 × 14

= 112

15 x (4-7) - 15 x (5-3)

= 15 x (-3) - 15 x (-2)

= 15 x (-3 - (-2))

= 15 x (-1)

= -15

73 x (8-59) - 59 x (8-73)

= 73 x 8 - 59 x 73 - 59 x (-65)

= 73 x 8 - 59 x (73 - (-65))

= 73 x 8 - 59 x 8

= 8 x (73-59)

= 8 x 14

= 112

a) 15 × (4 - 7) - 15 × (5 - 3)

= 15 × (-3) - 15 × 2

= 15 × (-3 - 2)

= -15 × 5 

= -75

b) 73 × (8 - 59) - 59 × (8 - 73)

= 73 × 8 - 73 × 59 - 59 × 8 + 59 × 73

= 8 × (73 - 59) + 73 × (59 - 59)

= 8 × 14 + 73 × 0

= 8 × 14

= 112

a) 59 . 73 - 30² +27 . 59

=59x(73+27)-30²

=59x100-30²

=5900-900

=5000

b) 1560 : [5 . 79 -( 125 + 5. 49) + 5. 21]

=1560:[5.79-(125+245)+5.21)

=1560:[5.(79+21)-(125+245)

=1560:[500-370]

=1560:130

=12