3千米比500米多多少米?
怎样简便怎样算. 1.73×3.5+3.5×4.27 3.36×2.5×0.4.
简便计算: 54.8﹣1.25﹣1.755.81+8.3+4.19+11.7 3.54×0.29﹣0.29×2.54 12.5×3.2×2.0.48×9.94.8×6.9+3.1×4.8.
8.37﹣2.58﹣3.42.
74+16=16+74 .
96×1.02=3.96+3.96×0.02,运用了乘法分配律. .