①2.091÷1.02=2.05②1.5÷0.045=33. ? 3 ③0.58×0.24=0.1392验算：④21÷24=0.875验算：⑤1.57÷3.9=0.40⑥3.42×0.25=0.86⑦70.7÷33=2.1 ?? 42
