(2012•宜丰县模拟)能简算的要简算2.5×45+6.5×80%+0.83.8×4.2+38×0.5847.5-(0.6+6.4÷0.32)40÷[47×(12+38)]134−916÷34+15220.32÷[12.8÷(0.25+0.15)].
(2012•宜丰县模拟)能简算的要简算 2.5×+6.5×80%+0.8 | 3.8×4.2+38×0.58 |
47.5-(0.6+6.4÷0.32) | 40÷[×(+)] |
1−÷+ | 0.32÷[12.8÷(0.25+0.15)]. |
答案和解析
(1)2.5×
+6.5×80%+0.8,
=0.8×(2.5+6.5+1),
=0.8×10,
=8;
(2)3.8×4.2+38×0.58,
=3.8×(4.2+5.8),
=3.2×10,
=32;
(3)47.5-(0.6+6.4÷0.32),
=47.5-(0.6+20),
=47.5-20.6,
=26.9;
(4)40÷[×(+)],
=40÷[×],
=40÷,
=80;
(5)1-÷+,
=1−+,
=1+,
=1;
(6)0.32÷[12.8÷(0.25+0.15)],
=0.32÷[12.8÷0.4],
=0.32÷32,
=0.01.
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