70(121212/565656+121212/727272+121212/909090)
tính tổng
A = 70 .[ 121212/565656 + 121212/727272 + 121212/909090
B = 191/210 + 161/240 +129/272 + 95/306
Tính nhanh
210.(111111/121212 +111111/202020+11111/303030 + 111111/424242 +111111/565656 +111111/727272 +111111/909090)
tính
\(70\left(\frac{252525}{565656}+\frac{252525}{727272}+\frac{252525}{909090}\right)\)
Tính 70\(\times\)(\(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\))
Thực hiện phép tính để tính giá trị các biểu thức sau:
\(a,A=\left(\frac{136}{15}-\frac{28}{5}+\frac{62}{10}\right).\frac{21}{24}\)
\(b,B=70.\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)
\(c,C=\frac{5}{2.1}+\frac{4}{1.11}+\frac{3}{11.2}+\frac{1}{2.15}+\frac{13}{15.4}\)
B = 70.(\(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\))
ai Đúng tk
Tính giá trị biểu thức:
\(a,A=\left(-1\right).\left(-1\right)^2.\left(-1^3\right).\left(-1\right)^4...........\left(-1\right)^{2016}.\left(-1\right)^{2017}\)
\(b,B=70.\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)
\(c,C=\frac{2a}{3b}+\frac{3b}{4c}+\frac{4c}{5d}+\frac{5d}{2a}\)
biết\(\frac{2a}{3b}=\frac{3b}{4c}=\frac{4c}{5d}=\frac{5d}{2a}\)
thực hiện phép tính sau
\(\left(\frac{151515}{60606}+\frac{151515}{121212}+\frac{151515}{202020}+\frac{151515}{303030}+\frac{151515}{424242}\right)\cdot\frac{28}{15}\)