早教吧作业答案频道 -->其他-->
估算.725÷80≈61×59≈617×19≈552÷61≈188×41≈99×81≈569÷71≈103×108≈
题目详情
估算.
725÷80≈ | 61×59≈ | 617×19≈ | 552÷61≈ |
188×41≈ | 99×81≈ | 569÷71≈ | 103×108≈ |
▼优质解答
答案和解析
725÷80,
≈728÷80,
=9;
61×59,
≈60×60,
=3600;
617×19,
≈600×20,
=12000;
552÷61,
≈600÷60,
=10;
188×41,
≈200×40,
=8000;
99×81,
≈100×80,
=8000;
569÷71,
≈560÷70,
=8;
103×108,
≈100×100,
=10000.
故答案为:9,3600,12000,10,8000,8000,8,10000.
≈728÷80,
=9;
61×59,
≈60×60,
=3600;
617×19,
≈600×20,
=12000;
552÷61,
≈600÷60,
=10;
188×41,
≈200×40,
=8000;
99×81,
≈100×80,
=8000;
569÷71,
≈560÷70,
=8;
103×108,
≈100×100,
=10000.
故答案为:9,3600,12000,10,8000,8000,8,10000.
看了估算.725÷80≈61×59...的网友还看了以下:
直接写出得数:0.5+0.4=0.90.9;1.4+2.7=4.14.1;8.2+3.7=11.9 2020-04-07 …
1-0.37=310×5×2=2.5×10=4×(25+50)=32.8+19=51÷17=240 2020-04-07 …
已知2x2+x-5=0,求代数式6x3+7x2-13x+11的值.x=0+5-2*2=1,结果为3 2020-06-03 …
0.25,0.5,2,()2,0.5数列A1B4C0.25D0.125 2020-07-09 …
1×2=1/3(1×2×3-0×1×2)2×3=1/3(2×3×4-1×2×3)3×4=1/3(3 2020-07-19 …
0.32.5-1.801-0.7+0.8-2.2中既大于2,有小于2的是?急0.32.5-1.80 2020-07-20 …
将下列4个数1.2^0.5,1.2^0.6,0.5^1.2,0.6^1.2,按从小到大的顺序排列为 2020-08-01 …
求斜率与倾斜角1.已知l与d向量平行求直线l的斜率与倾斜角(1)d向量=(2,-根号3)(2)d向 2020-08-01 …
初一数学(一元一次方程)1.x/3-x/6=12.3x/2+4=x/5+x+13.0.4x-0.5= 2020-10-31 …
观察下列各式1/(2^0.5+1)=2^0.5-1,1/(3^0.5+2^0.5)=3^0.5-2^ 2020-11-28 …