Question

计算下面各题，能简算的要简算．4.25+3.26-0.16+5.75 17.86×102-2×17.86 &n...

计算下面各题，能简算的要简算．4.25+3.26-0.16+5.75 17.86×102-2×17.86 3.68÷0.25÷4（12.5-0.125）×0.8 5.56×0.5-1.56÷2 5.4×[（3.2+4.06）÷6.05]．

Answer 1

①4.25+3.26-0.16+5.75
=（4.25+5.75）+（3.26-0.16）
=10+3.2
=13.2

②17.86×102-2×17.86
=17.86×（102-2）
=17.86×100
=1786

③3.68÷0.25÷4
=3.68÷（0.25×4）
=3.68÷1
=3.68

④（12.5-0.125）×0.8
=12.5×0.8-0.125×0.8
=10-0.1
=9.9

⑤5.56×0.5-1.56÷2
=5.56×0.5-1.56×0.5
=（5.56-1.56）×0.5
=4×0.5
=2

⑥5.4×[（3.2+4.06）÷6.05]
=5.4×[7.26÷6.05]
=5.4×1.2
=6.48