7.2×0.32+0.64×1.9-0.32简便运算

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7.2×0.32+0.64×1.9-0.32简便运算7.2×0.32+0.64×1.9-0.32简便运算7.2×0.32+0.64×1.9-0.32简便运算7.2×0.32+0.64×1.9-0.32

7.2×0.32+0.64×1.9-0.32简便运算
7.2×0.32+0.64×1.9-0.32简便运算

7.2×0.32+0.64×1.9-0.32简便运算
7.2×0.32+0.64×1.9-0.32
=7.2×0.32+0.32*2×1.9-0.32
=(7.2+2*1.9-1)*0.32
=10*0.32
=3.2

=7.2×0.32+0.32×2×1.9-0.32
=7.2×0.32+0.32×3.8-0.32
=0.32×(7.2+3.8-1)
=0.32×10
=3.2