2005*3/8-0.357*1949+3.75*2.4
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![2005*3/8-0.357*1949+3.75*2.4](/uploads/image/z/643812-60-2.jpg?t=2005%2A3%2F8-0.357%2A1949%2B3.75%2A2.4)
2005*3/8-0.357*1949+3.75*2.4
2005*3/8-0.357*1949+3.75*2.4
2005*3/8-0.357*1949+3.75*2.4
2005*3/8-0.357*1949+3.75*2.4
=2005×0.375-0.375×1949+0.375×24
=0.375×(2005-1949+24)
=0.375×80
=30;
2005*3/8-0.375*1949+3.75*2.4
=2005*0.375-0.375*1949+0.375*24
=0.375*(2005-1949+24)
=3/8*80
=30
2005×3/8-0.375×1949+3.75×2.4
=2005×3/8-3/8×1949+3/8×24
=(2005-1949+24)×3/8
=80×3/8
=30