早教吧作业答案频道 -->其他-->
(2012•乐清市)计算下列各题.(1)(102.5×56+77.5×24)÷304(2)999×222+333×334(3)1.44÷[1.2×(0.832+0.368)](4)32.6×51.4+674×5.14(5)(1+12)×(1-12)×(1+13)×(1-13)×…×(1+199)×(
题目详情
(2012•乐清市)计算下列各题.
(1)(102.5×56+77.5×24)÷304
(2)999×222+333×334
(3)1.44÷[1.2×(0.832+0.368)]
(4)32.6×51.4+674×5.14
(5)(1+
)×(1-
)×(1+
)×(1-
)×…×(1+
)×(1-
)
(1)(102.5×56+77.5×24)÷304
(2)999×222+333×334
(3)1.44÷[1.2×(0.832+0.368)]
(4)32.6×51.4+674×5.14
(5)(1+
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
99 |
1 |
99 |
▼优质解答
答案和解析
(1)(102.5×56+77.5×24)÷304,
=(102.5×7×8+77.5×3×8)÷304,
=(717.5+232.5)×8÷304,
=950×8÷304,
=25;
(2)999×222+333×334,
=333×3×222+333×334,
=333×(666+334),
=333×1000,
=333000;
(3)1.44÷[1.2×(0.832+0.368)],
=1.44÷[1.2×1.2],
=1.44÷1.44,
=1;
(4)32.6×51.4+674×5.14,
=326×5.14+674×5.14,
=(326×+674)×5.14,
=1000×5.14,
=5140;
(5)(1+
)×(1-
)×(1+
)×(1-
)×…×(1+
)×(1-
),
=
×
×
×
×…×
×
,
=(3×1×4×2×5×3×6×4×…×99×97×100×98)÷(2×3×4×5×…×98×99)2,
=100÷(2×99),
=
.
=(102.5×7×8+77.5×3×8)÷304,
=(717.5+232.5)×8÷304,
=950×8÷304,
=25;
(2)999×222+333×334,
=333×3×222+333×334,
=333×(666+334),
=333×1000,
=333000;
(3)1.44÷[1.2×(0.832+0.368)],
=1.44÷[1.2×1.2],
=1.44÷1.44,
=1;
(4)32.6×51.4+674×5.14,
=326×5.14+674×5.14,
=(326×+674)×5.14,
=1000×5.14,
=5140;
(5)(1+
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
99 |
1 |
99 |
=
3 |
2 |
1 |
2 |
4 |
3 |
2 |
3 |
100 |
99 |
98 |
99 |
=(3×1×4×2×5×3×6×4×…×99×97×100×98)÷(2×3×4×5×…×98×99)2,
=100÷(2×99),
=
50 |
99 |
看了 (2012•乐清市)计算下列...的网友还看了以下:
在小数0.832后面添上0后是0.8320,它和0.832相等.. 2020-04-11 …
matlab 2013 BP神经网络 拟合函数按照书上抄的,效果却不好 p=-1:0.1:0.9; 2020-05-17 …
一个东西如果按原定价出售则赚960元,如果按定价的8折出售则亏损832元,问进价是多少?小明仔细分 2020-06-18 …
一台电视机卖出去可以赚¥960,如果按现在的售价打八折,要亏¥832,电视机成本是多少?一台电视机 2020-07-09 …
估算832-218时可以把832看作,把218看作,结果932-218约等于.估算579×4时,可 2020-07-19 …
832×5×2=832×10,计算时运用了乘法()A.交换律B.结合律C.分配律 2020-07-31 …
下面是五年级某班女生的跳远成绩记录表(单位:米)2.752.352.573.052.832.652. 2020-10-30 …
下面是五年级1班女生的跳远成绩记录单(单位:米)2.52.352.573.052.832.52.83 2020-10-30 …
如何设置excel中保留1位有效小数后再计算?例如X=41.832,round(41.832,2)= 2020-11-01 …
"通信管道全长10.406km,折合20.832孔km"中的20.832孔km是什么意思,这个是一张 2020-12-05 …