问题
解答题
怎样简便就怎样算.
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答案
(1)4.3+0.98+0.7,
=(4.3+0.7)+0.98,
=5+0.98,
=5.98;
(2)5.27-3.9-0.1,
=5.27-(3.9+0.1),
=5.27-4,
=1.27;
(3)8.44-(5.44+2.8),
=8.44-5.44-2.8,
=3-2.8,
=0.2;
(4)4.9+0.1-4.9+0.1,
=4.9-4.9+0.1+0.1,
=0+0.1+0.1,
=0+0.1+0.1,
=0.2.