计算下面各题,能简便计算的要简便计算.5.27-1.98-0.02 3.2×5.7+6.8×...

计算下面各题,能简便计算的要简便计算.5.27-1.98-0.02 3.2×5.7+6.8×5.7 2.5×6.8×0.4 5.6-36÷30 0.72+9.6÷3.2  7.75×[20÷(3.24-3.04)].

①5.27-1.98-0.02   
=5.27-(1.98+0.02)
=5.27-2
=3.27;
     
②3.2×5.7+6.8×5.7
=(3.2+6.8)×5.7
=10×5.7
=57;

③2.5×6.8×0.4
=(2.5×0.4)×6.8
=1×6.8
=6.8;

④5.6-36÷30
=5.6-1.2
=4.4;

⑤0.72+9.6÷3.2
=0.72+3
=3.72;

⑥7.75×[20÷(3.24-3.04)]
=7.75×[20÷0.2]
=7.75×100
=775.
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...的要简便计算.5.27-1.98-0.02 3.2×5.7+6.8×...
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