Giup mik cau nay voi , Tinh = cach thuan tien nhat :
7/11+(7/15+5/11)
Tinh bang cach thuan tien nhat
4/7-2/5+17/7-3/5
giup minh voi minh dang can gap
= 17/7 + 4/7 - 2/5 + 3/5
= 21/7 - 5/5
= 3 - 1
= 2
tinh bang cach thuan tien nhat
a 21/11 * 22/17 * 68/63
5/14 * 7/13 * 26/25
cac ban giup mik nha mik cam on nhieu
bai 4 tinh bang cach thuan tien nhat: b, 12/7*3/4-3/4*12/7 giup minh voi
\(\dfrac{12}{7}\) \(\times\) \(\dfrac{3}{4}\) - \(\dfrac{3}{4}\) \(\times\) \(\dfrac{12}{7}\)
= \(\dfrac{9}{7}\) - \(\dfrac{9}{7}\)
= 0
tinh bang cach thuan tien nhat
a(6/11 + 5/11)*3/7
b.3/5 * 7/9 +3/5*2/9
c.(6/7 - 4/7) : 2/5
d.(8/15 : 2/11 + 7/15 : 2/11
bai 4: tinh bang cach thuan tien nhat: a, 5/9*5/2+4/9*5/2 , b, 12*3/4-3/4*12/7 lam kieu gi
giup minh voi
\(a,\dfrac{5}{9}\times\dfrac{5}{2}+\dfrac{4}{9}\times\dfrac{5}{2}=\dfrac{5}{2}\times\left(\dfrac{5}{9}+\dfrac{4}{9}\right)=\dfrac{5}{2}\times1=\dfrac{5}{2}\)
\(12\times\dfrac{3}{4}-\dfrac{3}{4}\times\dfrac{12}{7}=\dfrac{3}{4}\times\left(12-\dfrac{12}{7}\right)=\dfrac{3}{4}\times\dfrac{72}{7}=\dfrac{54}{7}\)
CAU EASY NAY
TINH BANG CACH THUAN TIEN NHAT
2/3 * 10/21 *3/2
22/5 * 12 * 5/12
7/2 * 28/81 * 2/7
5/17 * 21/4 * 47/15 * 0
2/3 * 10/21 * 3/2 = (2/3 * 3/2) * 10/21 = 1 * 10/21 = 10/21
22/5 * 12 * 5/12 = 22/5 * (12 * 5/12) = 22/5 * 5 =22
7/2 * 28/81 * 2/7= (7/2 * 2/7) * 28/81 = 1 * 28/81 =28/81
5/17 * 21/4 * 47/15 * 0 = 0
~Study well~
#Seok_Jin#
\(\frac{2}{3}\times\frac{10}{21}\times\frac{3}{2}\)
\(=\left(\frac{2}{3}\times\frac{3}{2}\right)\times\frac{10}{21}\)
\(=\left(\frac{1}{1}\times\frac{1}{1}\right)\times\frac{10}{21}\)
\(=1\times\frac{10}{21}\)
\(=\frac{10}{21}\)
Tinh bang cach thuan tien nhat 4/15+8/13+11/5+5/13
\(\frac{4}{15}+\frac{8}{13}+\frac{11}{15}+\frac{5}{13}\)
\(=\left(\frac{4}{15}+\frac{11}{15}\right)+\left(\frac{8}{13}+\frac{5}{13}\right)\)
\(=\frac{15}{15}+\frac{13}{13}\)
\(=1+1\)
\(=2\)
Chúc bạn học tốt nha !!!
\(\frac{4}{15}+\frac{8}{13}+\frac{11}{15}+\frac{5}{13}\)
\(=\left(\frac{4}{15}+\frac{11}{15}\right)+\left(\frac{8}{13}+\frac{5}{13}\right)\)
\(=1+1\)
\(=2\)
=(4/15+11/5)+(8/13+5/13)
=37/15+1=52/15
k mink nha
Tinh bang cach thuan tien nhat:
a/ 7,8 x 34,5 + 15,5 x 7,8
b/ 3/7 x 11/5 + 4/7 x 11/5
a/ = 7,8 x ( 34,5 + 15,5 ) = ..... tự tính
b/ 11/5 x (3/7 +4/7 )= .......tự tính
mk nhé
a, 7,8 x 34,5 +15,5 x 7,8 = 7,8 x ( 34,5 + 15,5) =7,8 x 50 =390
b, 3/7 x 11/5 +4/7 x 11/5 = 11/5 x ( 3/7 +4/7) = 11/5 x1=11/5
=.= hok tốt!!
7,8 . (34,5 + 15,5 )
= 7,8 .50.0
=39,000
Bai 1: tinh nham bang cach thuan tien nhat
A,2000-{46-[24+71*4):15]}
Giup minh voi
A = \(2000-\left\{46-\left[24+74.4\right]:15\right\}\)
A = \(2000-\left\{46-\left[24+296\right]:15\right\}\)
A = \(2000-\left\{46-320:15\right\}\)
A = \(2000-\left(46-\frac{64}{3}\right)\)
A = \(2000-\left(\frac{138}{3}-\frac{64}{3}\right)\)
A = \(2000-\frac{74}{3}\)
A = \(\frac{6000}{3}-\frac{74}{3}\)
A = \(\frac{5926}{3}\)