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- 2026-04-272×3. 7+3.7×5.8可以运用乘法交换律进行简算. [ ]
- 2026-04-2725×0.25×3.2= [ ]A． 1.25×4×0.25×8B． 1.25×0.8×0.25×4C．D．
- 2026-04-2725×8.08=1.25×( )=1.25×( )+1.25×( )=( )这是利用了( )律.
- 2026-04-274×8×2.5×8=8× [ ]
- 2026-04-27简便计算.41.2×8.1+11×1.25+53.7×1.9
- 2026-04-27根据运算定律填空.2.3×0.57= 0.57×( )1.6×=( )×( )×( )12.7×3.7+17.3×3.7=[( )+( )]×3.7
- 2026-04-27100-=100-45-应用了加法交换律和结合律. [ ]
- 2026-04-27用简便方法计算. (1)4.5×3.26+9.7×6.74+3.26×5.2(2)11.6×4.2+15.8×5.8+4.2×4.2(3)4.02×3.7-0.02×3.7+3.5×4