1) Calculati a+b;a-b;a*b si a:b
a=(650-12*50)*(14100-9400):235
a=(650*50)*4700:335
a=50*20
a=1000
b=(90*70-70*50-50*30-30*10):2
b=(6300-3500-1500-300):2
b=(2800-1500-300):2
b=(1300-300):2
b=1000:2
b=500
a=1000 si b=500
a+b=>100+500=1500
a-b=>100-500=500
a*b=1000*500=500000
a:500=2
2)
a=16*7-5*16-72:8
a=112-80-9
a=23
b=64:8+13*4-4*14
b=8+52-56
b=4
c=342:6-168:8
c=57-21
c=36
Calculati:
a)3a-3b+c
3*23-2*4+36=69-8+36=97
b)4a-3b+2c
4*23-3*8+2*36=92-24+72=140