70(121212/565656+121212/727272+121212/909090)
Tính:\(C=70.\left(\frac{121212}{565656}+\frac{121212}{727272}+\frac{121212}{909090}\right)\)
191/210+161/240+129/272+95/306
\(B=\frac{191}{210}+\frac{161}{240}+\frac{129}{272}+\frac{95}{306}\)
tÍNH TỔNG
Tính hợp lý nhất
a, 1/210+1/240+1/272+1/306
b, 191/210+161/240+129/272+95/306
giúp mình với huhuhu
Tính nhanh
210.(111111/121212 +111111/202020+11111/303030 + 111111/424242 +111111/565656 +111111/727272 +111111/909090)
Tinh : B = 191/210 + 161/240 + 129/272 + 95/306
Tinh nhanh 191/210+161/240+129/272+95/306
Tính nhan : 191/210+161/204+129/272+95/306