1、3.2+4.6÷2-0.2×5
=3.2+2.3-1
=5.5-1
=4.5
2、0.25×66+34×1/4
=0.25×(66+34)
=0.25×100
=25
3、125×8-200÷25
=1000-8
=992
1、3.2+4.6÷2-0.2×5
=3.2+2.3-1
=5.5-1
=4.5
2、0.25×66+34×1/4
=0.25×(66+34)
=0.25×100
=25
3、125×8-200÷25
=1000-8
=992
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