A-A+
49×3.25+959×314;4517-(1517+0.625);(25+12)×(4-2
问题详情
参考答案
(1)49×3.25+959×314
=49×3.25+959×3.25
=(49+959)×3.25
=10×3.25
=32.5;
(2)4517-(1517+0.625)
=4517-1517-0.625
=(4517-1517)-0.625
=3-0.625
=2.375;
(3)(25+12)×(4-223)
=910×43
=65;
(4)3.12÷1.2-1.2×0.6
=2.6-0.72
=1.88;
(5)1998+7650÷75
=1998+102
=2100;
(6)(114+256)÷(114×0.8-0.3)
=4912÷(1-0.3)
=4912÷0.7
=4912÷710
=4912×107
=356.
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