a) 1.646×10=16.46
b) 2.3×25+102=57.5+102=159.5
c) 6.52×11-2,4=71.72-2.4=69.32
d) 21×1.21+0.35×50=25.41+17.5=42.91
e) 20×2.5+0.75:2+1=50+0.375+1=51.375
f) 14.11×3.4+64:8+7^{2}=47.974+8+49=55.974+49=104.974
Calculele cu numere cu virgule se fac la fel ca cele cu numere normale: la inmultire, tii cont totusi de zecimale/sutimi/miimi etc. si adaugi la final virgula dupa cate zecimale/sutimi/miimi etc. ai acolo.
