问题
解答题
怎样算简便就怎样算.
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答案
(1)6.71×0.52+4.8×0.671,
=6.71×0.52+0.48×6.71,
=6.71×(0.52+0.48),
=6.71×1,
=6.71;
(2)2.5×(3.5-1.65)×0.4,
=2.5×1.85×0.4,
=2.5×0.4×1.85,
=1×1.85,
=1.85;
(3)102×4.5,
=(100+2)×4.5,
=100×4.5+2×4.5,
=450+9,
=459;
(4)6.25÷1.25÷0.8,
=6.25÷(1.25×0.8),
=6.25÷1,
=6.25;
(5)8.3-2.63+2.73×1.5,
=8.3-2.63+4.095,
=5.67+4.095,
=9.765.