6.3+0.35=6.65, 8.73÷100=0.0873,
65.6-7.2-2.8=55.6, 0.69×10=6.9,
0.1×3.9=0.39, 2.5+3.08+7.5=13.08,
5.2+0.08=5.28, 20-8.2=11.8,
83.6×100÷10=836.
6.3+0.35=6.65, 8.73÷100=0.0873,
65.6-7.2-2.8=55.6, 0.69×10=6.9,
0.1×3.9=0.39, 2.5+3.08+7.5=13.08,
5.2+0.08=5.28, 20-8.2=11.8,
83.6×100÷10=836.