viets số thích hợp vào chỗ chấm 21,43m.............m................cm 1060m=................km...............m 5843kg=............tấn 372g=..............kg 160g=.................kg 7000kg=................tán 35160m2=.......................hm2.............................m2 34,50km2=........km2=..........................ha 15,735m2=..................................ha 0,42m2=...................dm2