Question

Vă rog mult dau coroana si 50 pct

Answer 1

Sper ca te-am ajutat!

Answer 2

25×87+25×96=2175+2400=4575
25×(87+95)=25×179=4575

110×93-110×64=10230-7040=3190
110×(93-64)=110×29=3190

39×76+39×128=2964+4992=7956
39×(76+128)=39×204=7956

75×208-75×128=15600-9600=6000
75×(208-128)=75×80=6000

325×15+324×25=4860+8100=12960
324×(15+25)=324×40=12960

57×120-57×45=6840-2565=4275
57×(120-45)57×75=4275

ex 2
a+124×84=230×65
a=124×84=14950
a=10416=14950
a=14950-10416
a=4534

39×280-b=20×80
39×280-b=1600
b=10920=1600
b=10920-1600
b=9320

c-320×60=425×40
c-320×60=17000
c-19200=17000
c=19200+17000
c=36200

57×620-d=40×350
57×620-d=14000
d=35340=14000
d=35340-14000
d=21340