早教吧作业答案频道 -->其他-->
脱式计算.(能简算的要简算)7.02×1.021.125÷0.092001×0.54+2001×0.460.64×0.25+0.750.78÷26+0.5×0.02[2.8-2.8×(2.8-2.8)]÷0.78×[1÷(3.2-2.95)]33.4-26.465÷(2.6+4.1)
题目详情
脱式计算.(能简算的要简算) 7.02×1.02 | 1.125÷0.09 |
2001×0.54+2001×0.46 | 0.64×0.25+0.75 |
0.78÷26+0.5×0.02 | [2.8-2.8×(2.8-2.8)]÷0.7 |
8×[1÷(3.2-2.95)] | 33.4-26.465÷(2.6+4.1) |
▼优质解答
答案和解析
(1)7.02×1.02,
=7.02×(1+0.02),
=7.02+7.02×0.02,
=7.02+0.1404,
=7.1604;
(2)1.125÷0.09,
=112.5÷9,
=12.5;
(3)2001×0.54+2001×0.46,
=2001×(0.54+0.46),
=2001×1,
=2001;
(4)0.64×0.25+0.75,
=0.16+0.75,
=0.91;
(5)[2.8-2.8×(2.8-2.8)]÷0.7,
=[2.8-2.8×0]÷0.7,
=2.8÷0.7,
=4;
(6)0.78÷26+0.5×0.02,
=0.03+0.01,
=0.04;
(7)8×[1÷(3.2-2.95)],
=8×[1÷0.25],
=8×4,
=32;
(8)33.4-26.465÷(2.6+4.1),
=33.4-26.465÷6.7,
=33.4-3.95,
=29.45.
=7.02×(1+0.02),
=7.02+7.02×0.02,
=7.02+0.1404,
=7.1604;
(2)1.125÷0.09,
=112.5÷9,
=12.5;
(3)2001×0.54+2001×0.46,
=2001×(0.54+0.46),
=2001×1,
=2001;
(4)0.64×0.25+0.75,
=0.16+0.75,
=0.91;
(5)[2.8-2.8×(2.8-2.8)]÷0.7,
=[2.8-2.8×0]÷0.7,
=2.8÷0.7,
=4;
(6)0.78÷26+0.5×0.02,
=0.03+0.01,
=0.04;
(7)8×[1÷(3.2-2.95)],
=8×[1÷0.25],
=8×4,
=32;
(8)33.4-26.465÷(2.6+4.1),
=33.4-26.465÷6.7,
=33.4-3.95,
=29.45.
看了 脱式计算.(能简算的要简算)...的网友还看了以下:
1/2{1/2[1/2(1/2y-3)-3]-3}=17x-1/0.024=1-0.2x/0.08 2020-04-27 …
1/2*101/100=101/200这一步是因为什么这么做的?原题是1-1/2^2)(1-1/3 2020-05-14 …
(1)1/1*2+1/2*3+.+1/2009*2010(2)1/2*4+1/4*6+.+1/20 2020-05-17 …
观察按下列规律排成的一列数:1\1,1\2,2\1,1\2,2\2,3\1,1\4,2\3,3\2 2020-06-25 …
(1/2+1/3+1/4+...1/2013)X(1+1/2+1/3+1/4+...1/2012) 2020-07-14 …
必修I·指数函数部分化简[1+2^(1/8)][1+2^(1/4)][1+2^(1/2)]快+好者 2020-08-02 …
设R^3中的一组基ξ1=(1,-2,1)T,ξ2=(0,1,1)T,ξ3=(3,2,1)T,向量α在 2020-11-02 …
求一道预备班数学期中考试的答案小明在做题时发现了一个规律:1*2/1=1-2/1,2*3/1=2/1 2020-11-05 …
观察下列等式①1/√2+1=√2-1/(√2+1)(√2-1)=-1+√2②1/√3+√2=√3-√ 2020-12-07 …
高中数学抽象函数已知定义在(-1,1)上的函数f(x)满足f(1/2)=1,且对任意x,y∈(-1, 2020-12-08 …