B3:
\(2,305kg=2305g\)
\(0,01kg=10g\)
\(4,2kg=4200g\)
\(0,009kg=9g\)
\(4,08kg=4080g\)
\(0,052kg=52g\)
B4:
\(1kg725g=1,725kg\)
\(1\)\(tấn\)\(3tạ\)\(=1,3tấn\)
\(2tấn64kg=2,064tấn\)
\(6528g=6,528kg\)
\(3kg45g=3,045kg\)
\(4tạ=0,4tấn\)
\(7tấn125kg=7,125tấn\)
\(789g=0,789kg\)
\(12kg5g=12,005kg\)
\(64g=0,064kg\)
\(4yến=0,04tấn\)
\(177kg=0,177tấn\)