0.45*99-0.9*49.5简算怎么算
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![0.45*99-0.9*49.5简算怎么算](/uploads/image/z/4396-4-6.jpg?t=0.45%2A99-0.9%2A49.5%E7%AE%80%E7%AE%97%E6%80%8E%E4%B9%88%E7%AE%97)
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0.45*99-0.9*49.5简算怎么算
0.45*99-0.9*49.5简算怎么算
0.45*99-0.9*49.5简算怎么算
0.45*99-0.9*49.5
=0.45*99-0.45*2*49.5
=0.45(99-99)
=0
0.45×99-0.9 ×49.5=0.45×99-0.45 ×(2×49.5)
=0.45×99-0.45×99
=0