ted55155+1080p

裘顾详4494还有问题.根号45+根号108+根号4/3 - 根号125等于多少 -
饶鹏砌13937661347 ______ 解:√45+√108+√4/3-√125 =3√5+6√3+2√3/3-5√5 =20√3/3-2√5.

裘顾详4494100分784+108大约是( )798 - 305+253大约是( )没说啊,书上也没讲怎么大约.真难啊.答案都是1000不行吗? -
饶鹏砌13937661347 ______[答案] 784+108约等于800+100约等900 798-305+253约等于800-300+250约等于750

裘顾详4494方程12.5+X=108 怎么解
饶鹏砌13937661347 ______ 12.5+x-12.5=108-12.5 x=95.5

裘顾详449447乘以十五加五乘三十三用简便方法计算. -
饶鹏砌13937661347 ______ 47*15+5*33=47*15+5*3*11=47*15+15*11=(47+11)*15=58*15=29*2*15=29*30=870

裘顾详44941000+999 - 998 - 997+996+995 - 994 - 993+…+108+107 - 106 - 105+104+103 - 102 - 101=______. -
饶鹏砌13937661347 ______[答案] 1000+999-998-997+996+995-994-993+…+108+107-106-105+104+103-102-101 =1000+(999-998)-(997-996)+(995-994)-(993-992)+…+(107-106)-(105-104)+(103-102)-101, =1000+1-1+1-1+…+1-1+1-101, =1000+1-101, =900. 故答案为:900

裘顾详449477*56+108巧算 -
饶鹏砌13937661347 ______ =7*11*7*8+108=49*88+108=50*88-1*88+108=4400-88+108=4508-88=4420

裘顾详4494计算:sin[arctan(2915/108)]
饶鹏砌13937661347 ______ √(2915²+108²)=√(8497225+11664)=√8508889=2917arctan(2915/108)=arcsin(2915/2917)原式=2915/2917