neu cac giai thuan tien nhat .
473+517+198=
tính bang cach thuan tien nhat
198 x 27 + 198 x 72 + 198
198×27+198×72+198
=198×27+198×72+198×1
=198×(27+72+1)
=198×100
=19800
=198x(27+72+1)
=198x100=19800
vậy..............
k mình nha
cac ban giai giup minh bai nay voi , nhanh nha minh dang can gap
1/2+ 1/4 +1/8 + 1/16 + 1/32 + 1/64
tinh bang cach thuan tien nhat mha
\(=\frac{32+16+8+4+2+1}{64}=\frac{63}{64}\)
tinh bang cach thuan tien nhat; 25*1357*4; giai ho yui nha
25x1357x4
=1357x(25x4)
=1357x100
=135 700
tinh thuan tien nhat: { 2019- [-521] } - {202 +521} +{-456 +202}
Giup minh voi nhe cac ban hien
{ 2019 - [ -521]} - {202 + 521} + {-456 + 202}
= 2019 + 521 - 202 - 521 + -456 + 202
= 2019 + (521 - 521) + (-202 + 202) + -456
= 2019 + 0 + 0 + -456
= 2019 + -456
= 1563
[2019 - (-521)] - (202 + 521) + (-456 + 202)
= 2019 + 521 - 202 - 521 - 456 + 202
= (2019 - 456) + (521 - 521) - (202 - 202)
= 1563
= (2019+521) - (202+521) +(456+202)
= 2019 + 521 -202 - 521 +456 +202 =2019 +456 = 2475
vi sao giai cap vo san tien hanh cac cuoc dau tranh CM. Hay neu cac hinh thuc dau tranh cuar giai cap vo san.
Em an tuong nhat ve cuoc dau tranh cua giai cap vo san quoc gia nao? Vi sao???
cc oi jupppppppp to vsssssssss
cam on cc trc nha :DD
1,hieu cua 2 so la 13/18 . Neu them vao so tru 1/6 thi hieu 2 so la ?
2, tinh = cach thuan tien nhat :
19/15 + 31/23 - 4/15 - 8/23
3, 1 doi cong nhan sua 1 quang duong . Ngay thu nhat doi sua duoc 3/8 quang duong . Hoi doi cong nhan can phai sua ? phan quang duong ?
Ai giup mik dau tien voi tat ca cac bai toan tren thi se duoc chon va ket bn
1) Hiệu mới là :
13/18 - 1/6 = 10/18
Đ/s:.......
mik viet lai bai 3 nha
3, 1 doi cong nhan sua 1 quang duong . Nay thu nhat doi sua duoc 3/8 quang duong , ngay thu 2 sua duoc 1/3 quang duong .
Cau hoi thi cac bn doc doan tren nha !
2) 19/15 + 31/23 - 4/15 - 8/23
= ( 19/15 - 4/15 ) + ( 31/23 - 8/23 )
= 15/15 + 23/23
= 1 + 1
= 2
Moi cac ban tinh dum minh cai
tinh bang cach thuan tien nhat:
1/2x3 + 1/3x4 + 1/4x5 +1/5x6
Đặt \(A=\frac{1}{2x3}+\frac{1}{3x4}+\frac{1}{4x5}+\frac{1}{5x6}\)
\(A=\frac{3-2}{2x3}+\frac{4-3}{3x4}+\frac{5-4}{4x5}+\frac{6-5}{5x6}\)
\(A=\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+\frac{1}{5}-\frac{1}{6}\)
\(A=\frac{1}{2}-\frac{1}{6}\)
\(A=\frac{3}{6}-\frac{1}{6}\)
\(A=\frac{2}{6}=\frac{1}{3}\)
cho 3 chu so 4,5,6.
hay viet tat ca cac so thap phan co 3 chu so khac nhau.
tinh tong cac so viet duoc bang cach thuan tien nhat
Hay so sanh cac phan so 2010/2011 2011/2012 2012/2013 2013/2011 voi 4 bang cach thuan tien nhat
2010/2011 < 1 => 2010/2011 < 4
2011/2012 < 1 => 2011/2012 < 4
2012/2013 < 1 => 2012/2013 < 4