Các câu hỏi tương tự
tìm x:
a.(x+1997)+2003=5432
b.329-(129+x)=14*7
dau* la dau nhan
Cho phep tinh: *58? x 4 = 14??8 (Biet moi dau ''*" hoac dau "?" la ot chu so). Hoi dau "?" la chu so may?
mot doi cong nhan ngay thu nhat may duoc 20 bo quan ao ngay thu 2 may duoc it hon ngay dau la 4 bo ngay thu 3 may gap 3 lan ngay dau tinh trung binh moi ngay doi cong nhan may duoc
( 1 -\(\frac{1}{3}\)) x ( 1 -\(\frac{1}{4}\)) x ( 1-\(\frac{1}{5}\)) ... x ( 1 -\(\frac{1}{204}\)) tinh nhanh
nho viet dau nhan nha dung dau cham
1.Dien so thich hop vao cho cham a, 4m2 5 dm2 ................ dm2 80 000 cm2 ...................... m27m2 14 cm2 ...................... cm2 4 000 000 m2 ..................... km29 km2 15 m2 ................... m2 15 000 009 m2 .................. km2 ............ m2b, 3/4 gio ................. phut ; 3/5 the ki .........
Đọc tiếp
1.Dien so thich hop vao cho cham
a, 4m2 5 dm2 = ................ dm2 80 000 cm2 = ...................... m2
7m2 14 cm2 = ...................... cm2 4 000 000 m2 = ..................... km2
9 km2 15 m2 = ................... m2 15 000 009 m2 = .................. km2 ............ m2
b, 3/4 gio = ................. phut ; 3/5 the ki = ............. nam ; 5/6 ngay = ................... gio
c, tinh 5/12 + ( 3/4 + 2/3 ) : 34/3 = ..........................................................................................................
2.Tim X
a,7 x X + 5 x X = 175 + 125 b, 14 x X - 6 x X = 64 x16
4. Tim so co 4 chu so , biet rang khi viet them chu so 2 vao ben trai so do thi duoc so moi gap 17 lan so can tim ?
5. a, Sap xep cac phan so sau theo thu tu tu lon den be :
3/8 ; 5/6 ; 4/3 ; 13/12; 5/4
b, khoanh vao phan so lon hon 4/5 :
5/4 48/60 20/24 36/ 45 18/15
5. trong vuon co 81 cay cam , quyt va dao . So cay cam = 2/3 so cay quyt , so cay quyt = 3/4 so cay dao . Hoi trong vuon do co ? cay moi loai ?
Cac bn luu y bai 2 tim x dau x nay la dau nhan X dau X nay la ich xo
cho A=x459y .Tim chu so x,y thoa man de khi A chia cho 2,5 va 9 thi nhan duoc so du la 1
tim x biet x nhan 2 cong x nhan 3 cong x nhan 4 cong x bang 100
35 nhan x + 1/2 : 5/3 - 5/4 = 1/2 x 1/3
3/5 nhan x + 1/2 : 5/3 - 5/4 = 1/2 x 1/3
bai 3 : tim x
6 nhan ( x+9845 ) = 29042 nhan 6
(x chia 3) nhan 8 = 8 nhan 3198
bai 7 : tim x
191+ x + 9 = 43 nhan 5
x nhan 25 nhan 4 = 125 nhan 8
bai 8 : tim x
128 nhan x - 12 nhan x - 16 nhan x = 5208000
x nhan 27 + x nhan 30 + x nhan 43 =210500