6.4×4.5+3.6×45的簡便計算 急.

6.4×4.5+3.6×45的簡便計算 急.


6.4×4.5+3.6×45
=0.64×45+3.6×45
=45×（0.64+3.6）
=45×4.24
=190.8



4.4×57.8+45.3×5.6用簡便運算


=4.4×57.8+（57.8-12.5）×5.6
=4.4×57.8+5.6×57.8-12.5×5.6
=（4.4+5.6）×57.8-12.5×0.8×7
=10×57.8-10×7
=578-70
=508



0.4*[5/6*（3/20+0.45）]簡便運算，咋算、？


0.4*[5/6*（3/20+0.45）]
=0.4*5/6*（3/20+9/20）
=2/6*（12/20）]
=1/3 * 3/5
=1/5

Elden Ring Premiere

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