72+28×10824×125×7402×[494÷(102-83)]6.908-8×(73-46)5.36×64-64+64×657.908-8×(73-46)
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解决时间 2021-04-15 00:42
- 提问者网友:练爱
- 2021-04-14 04:18
72+28×10824×125×7402×[494÷(102-83)]6.908-8×(73-46)5.36×64-64+64×657.908-8×(73-46)
最佳答案
- 五星知识达人网友:刀戟声无边
- 2021-04-14 04:52
解:(1)72+28×108,
=72+3024,
=3096;
(2)24×125×7,
=(3×7)×(8×125),
=21×1000,
=21000;
(3)402×[494÷(102-83)],
=402×[494÷19],
=402×26,
=10452;
(4)6.908-8×(73-46),
=6.908-8×27,
=6.908-216,
=-209.092;
(5)5.36×64-64+64×65,
=(5.36-1+65)×64,
=69.36×64,
=4439.04;
(6)7.908-8×(73-46),
=7.908-8×27,
=7.908-216,
=-208.092.解析分析:(1)(3)(4)(6)依据四则运算计算顺序:先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序计算,有括号先算括号里面的解答,(2)化24=8×3,再运用乘法结合律解答,(5)运用乘法分配律解答.点评:(1)正确依据四则运算计算顺序进行计算,(2)正确运用简便算法计算是本题考查知识点.
=72+3024,
=3096;
(2)24×125×7,
=(3×7)×(8×125),
=21×1000,
=21000;
(3)402×[494÷(102-83)],
=402×[494÷19],
=402×26,
=10452;
(4)6.908-8×(73-46),
=6.908-8×27,
=6.908-216,
=-209.092;
(5)5.36×64-64+64×65,
=(5.36-1+65)×64,
=69.36×64,
=4439.04;
(6)7.908-8×(73-46),
=7.908-8×27,
=7.908-216,
=-208.092.解析分析:(1)(3)(4)(6)依据四则运算计算顺序:先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序计算,有括号先算括号里面的解答,(2)化24=8×3,再运用乘法结合律解答,(5)运用乘法分配律解答.点评:(1)正确依据四则运算计算顺序进行计算,(2)正确运用简便算法计算是本题考查知识点.
全部回答
- 1楼网友:长青诗
- 2021-04-14 05:51
谢谢回答!!!
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