tính nhanh :11/12x12/3x13/14:22/28
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{6}{18}\times\frac{14}{28}\times\frac{11}{22}=\frac{1}{3}\times\frac{1}{2}\times\frac{1}{2}=\frac{1}{12}\)
a) (9+11+13+15)-(10+12+14)
= 38 - 36
= 2
b) (22+26-28)+(24+30)
= 20 +54
= 74
k cho mik nha
\(\dfrac{11}{12}\times\dfrac{12}{13}\times\dfrac{13}{14}:\dfrac{22}{28}\)
\(=\dfrac{11}{12}\times\dfrac{12}{13}\times\dfrac{13}{14}\times\dfrac{14}{11}\)
\(=\dfrac{11\times12\times13\times14}{12\times13\times14\times11}\)
\(=1\)
=================
\(3\times\dfrac{7}{10}+\dfrac{7}{10}\times5+2\times\dfrac{7}{10}\)
\(=\dfrac{7}{10}\times\left(3+5+2\right)\)
\(=\dfrac{7}{10}\times10=7\)
\(\dfrac{11}{12}\times\dfrac{12}{13}\times\dfrac{13}{14}:\dfrac{22}{28}\)
\(=\dfrac{11}{12}\times\dfrac{12}{13}\times\dfrac{13}{14}:\dfrac{11}{14}\)
\(=\dfrac{11}{12}\times\dfrac{12}{13}\times\dfrac{13}{14}\times\dfrac{14}{11}\)
\(=\dfrac{11\times12\times13\times14}{12\times13\times11\times14}\)
\(=1\)
\(3\times\dfrac{7}{10}+\dfrac{7}{10}\times5+2\times\dfrac{7}{10}\)
\(=\dfrac{7}{10}\times\left(3+5+2\right)\)
\(=\dfrac{7}{10}\times10\)
\(=7\)
22 x 11 + 28 x 11
= ( 22 + 28 ) x11
= 50 x 11
= 550
Chúc bạn học tốt!
=\(\frac{6.14.11}{18.28.22}\)= \(\frac{6.14.11}{6.3.14.2.11.2}\)= \(\frac{1}{3.2.2}\)= \(\frac{1}{12}\)
\(\frac{6}{18}\) x \(\frac{14}{28}\) x \(\frac{11}{22}\)
= \(\frac{1}{3}\) x \(\frac{1}{2}\) x \(\frac{1}{2}\)
= \(\frac{1}{12}\)
Chúc bạn học giỏi!
(1+29)+(2+28)+(3+27)+(4+26)+(5+25)+(6+24)+(7+23)+(8+22)+(9+21)+(10+20)+(11+19)+(12+18)+(13+17)+(14+16)+15
=30+30+30+30+30+30+30+30+30+30+30+30+30+30+15
=30x14+15
=435
3 × 15 + 3 × 27 + 3 × 13 + 3 × 45
= 3 × ( 15 + 27 + 13 + 45 )
= 3 × 100
= 300
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18*19*0*20*21*22*23*24*25*26*27*28*29*30*31*32=0