估算下面各题. 4.03×1.98≈ 3.95×0.2≈ 8.1×10.01≈ 16.2÷1.9≈ 59.8÷3.
估算下面各题.4.03×1.98≈3.95×0.2≈8.1×10.01≈16.2÷1.9≈59.8÷3.1≈10.32÷0.21≈99.9÷0.5≈70.2×3.02≈...
估算下面各题. 4.03×1.98≈ 3.95×0.2≈ 8.1×10.01≈ 16.2÷1.9≈ 59.8÷3.1≈ 10.32÷0.21≈ 99.9÷0.5≈ 70.2×3.02≈
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