0.99 ×1.10.99 6.626.602 23.9÷100.239×10
0.2分米2厘米 8.6×0.988.6 7.2×0.017.2×0.1
0.2×100=
15÷1000=
880÷40=
169+89-69=
25×4÷25×4=
40-40÷40=
7.4×1000÷100=
78÷78+78=