1-0.3=          5.3+0.5=          4.7-2.3=          0.5×0.2=

4×0.25=        75.6÷100=        10-0.9=           3.6×100=

①6.8+3.54=

②0.57-0.48=

③0.53×0.15=

④3.21+4.89=

⑤20-11.65=

⑥5.25×0.4=

⑦0.34×4.3=

⑧28.65-15.54=

⑨30.6×1.7=

4.271.23+3.15          5.43×0.925.43             1.01×0.970.97

①6.5×0.98+3.5×0.98

②7.8×9.9

③12.5×（2.774-1.274）

④15.73-（2.17+0.73）-1.83

⑤6.8×0.99

⑥800×0.42×0.125