小数乘法计算竞赛VIP免费

小数乘法计算竞赛一、口算5.01×8=3×6.4=0.8×2.4=0.4×0.8=3.8×0.2=2.5×0.04=5.6×0.7=15.3×0.6=0.47×0.6=70×0.42=9×0.12=4.01×10=3.5×0.03=0.82×0.5=4.23×0.4=二、计算12.6×25=3.35×1.2=24.8×0.15=0.25×32.4=50.6×20=8.27×2.9=7.56×0.9=0.78×1.05=60×4.25=三、估算0.79×0.22≈4.95×0.43≈6.1×9.8≈8.9×3.01≈0.46×0.28≈2.69×0.7≈0.59×0.72≈7.09×0.27≈0.49×6.3≈4.9×0.08≈9.2×0.28≈3.26×0.42≈8.52×3.7≈12.6×0.27≈2.06×0.17≈0.58×0.62≈