\(=25\cdot\left(76+24\right)+75\left(147-47\right)\)

=10000

25. (76+24) + 75.(147-47)

= 25. 100 +75. 100

= 10000

25.76 + 75.147 + 25.24 - 47.75
=[ 25 . ( 76 + 24 )] + [75 . ( 147 – 47 ) ]
= [ 25 . 100 ] + [ 75 . 100 ]
= 2500 + 7500
= 10 000

= 25.24 + 2.25.83

= 25(24 + 2.83)

= 25.190 = 4750

235

b. 2,35 \(\times\) 14,5 + 2,35 \(\times\) 84,5 + 2,35

= 2,35 \(\times\) ( 14,5 + 84,5 + 1 ) 

= 2,35 \(\times\) 100

= 235

=2,35x100=235

a) 15 . 18 = (10+5).18 = 180 + 90= 270

b)  25.24   = (20+5).24 = 480 + 120 = 600

c)125.72 = (100+25) . 72 = 7200 + 1800 = 9000

d) 55.14 = 55. ( 10+4) = 550 + 220= 770

a. 15.18=3.5.3.6=(3.3).(5.6)=9.30=270

b. 25.24=5.5.6.4=(5.4).(5.6)=20.30=600

c. 125.72=5^3.2^3.9=(5.2)^3.9=1000.9=9000

d. 55.14=5.11.7.2=(7.11).(5.2)=77.10=770

B=(\(\left(\dfrac{4}{9}+\dfrac{5}{9}\right).\left(\dfrac{-1}{19}\right)\)

   =1.\(\dfrac{-1}{19}\)

   =\(\dfrac{-1}{19}\)

=(-1/19)x(4/9+5/9)

=(-1/19)x(9/9)

=(-1/19)x1

=-1/19

a) 270

 b)600

 c)9000

  d)770

a) 15.18 = 3.5.3.6= 3².5.6= 9.30 = 270

b) 25.24= 25.4.6= 100.6 = 600

c) 125.72= 5.5².4.18 = 5.100.18= 1800.5=9000   

d) 55.14= 5.11.7.2 = 5.2.11.7= 10.11.7= 110.7= 770