Tinh 28%+11/50+17%+33%
a,Tính 28%+11/50+17%+33%
Tinh:17/25*11/28+34/50*17/28=....
(Viet duoi dang phan so toi gian)
17/25*1128+34/50*17/28=187/700+289/700=17/25
17/25 x 11/28 + 34/50 x 17/28 = 17/25
k mk nha mk k lai
Tinh mot cach hop li :
e) 88 - 11 . ( 50 + 9 )
f) 85 . ( 35 - 27 ) - 35 . ( 85 - 27 )
g) 33 . ( 17 - 5 ) - 17 . ( 33 - 5 )
giup minh voi minh dang can rat gap
e/ = -561
f/ = -1350
g/ = -80
tích nha..^.^...♥
17/25 x 11/28 + 34/50 x 17/28
17/25 x 11/28 + 34/50 x 17/28 = ?
\(\frac{17}{25}\times\frac{11}{28}+\frac{34}{50}\times\frac{17}{28}=\frac{187}{700}+\frac{289}{700}=\frac{17}{25}\)
\(\frac{17}{25}\cdot\frac{11}{28}+\frac{34}{50}\cdot\frac{17}{28}\)
\(=\frac{187}{700}+\frac{578}{1400}\)
=\(\frac{952}{1400}\)
=\(\frac{119}{175}\)
câu trả lời cho câu hỏi của Huong Le Thị Lan: 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32.
=(1+32)+(2+31)+(3+30)+(4+29)+(5+28)+(6+27)+(7+26)+(8+25)+(9+24)+(10+23)+(11+22)+(12+21)+(13+20)+(14+19)+(15+18)+(16+17)
=33+33+33+33+33+33+33+33+33+33+33+33+33+33+33+33. =33.16 (dấu chấm là dấu nhân)=528
wow! mù mắt. Ido tính toán có khác!
C2:(32+1)x32:2=528
bạn tính thử xem đúng đấy.
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=1275
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50.
Có ai rảnh đâu mà đi ngồi cộng ngần đấy số ra.
tinh bang cach thuan tien nhat
2*25*50*8
12*11+21*11+11*33
2x25x50xx8=(25x8)x(50x2)=200x100=20000
12x11+21x11+11x33=11x(12+21+33)=11x66=726
2*25*50*8
=(2*50)*(25*8)
=100*200=20000
12*11+21*11+11*33
=11*(12+21+33)
=11*66=676
2 x 25 x 50 x 8 = (8 x 25) x (50 x 2) = 200 x 100 = 20000
b) 12 x 11 + 21 x 11 + 11 x 13 = 11 x (12 + 21 + 33)
= 11 x 66 = 726