bai 1 : Tim hieu cua hai so, biet rang so lon them 735 don vi va so ben them 449 don vi thi duoc hieu moi la 2000.
Bai 2 : Khi thuc hien phep tru hai so, mot ban da so y viet sai nhu sau : o so bi tru co hai chu socuoi cung la 35 da viet thanh 53 nen phep tru sai co ket qua la 1234. Tim hieu dung cu ahia so do.
Bai 3 : TIm mot so biet rang so do cong voi so lon nhat co ba chu so khac nhau roi cong tiep voi so be nhat co bon chu so khac nhau thi duoc so be nhat co nam chu so.
Bai 4 ; Cho ba chu so tu nhieu A ; B ; C. Biet rang tong cua A va B la 492 ; tongg cua B va C la 936 ; tong cua C va A la 714. Tim ba so do.
Bai 5 : HAi kho chu atat ca 2500 tan thoc. Sau khi lay ra o moi kho so tan thoc nhu sau. thi kho thu nhat con 800 tan va kho thu hai con 500 tan. Hoi luc dau moi kho chua bao nhieu tan thoc?
Tich cua hai so la 0.06.Hoi:
a)Neu thua so thu nhat gap len 10 lan roi nhan voi thua so thu hai thi duoc tich moi la bao nhieu?
b)neu thua so thu nhat chuyen day phay sang ben phai hai chu so roi nhan voi thua so thu hai thi duoc tich moi la bao nhieu?
c)thua so thu nhat nhan voi 1000 lan thua so thu hai thi duoc tich moi la bao nhieu?
d)tich cua hai so da cho phai nhan voi so nao de co tich bang 600?
Giai tung phan mot
khi chia mot so tu nhien co 4 chu so cho tong cac chu so cua so do thi duoc thuong lon nhat la bao nhieu
Bai 1 : Tong cua hai so la 2000. Neu so hang thu nhat them 135 don vi va so hang thu hai bot 531 don vi thi duoc tong moi la bao nhieu?
Bai 2 : Tim tong hai so biet rang neu so hang thu nhat bot di 246 don vi va so hang thu hai them 642 don vi thi duoc tong moi bang 2010.
Bai 3 : Hieu cua hai so la 1000. Neu so lon them 235 don vi va so be bot 200 don vi thi duoc hieu moi la bao nhieu?
Bai 4 : Hieu cua hai so bang 1234. Neu so lon bot 234 don vi va so be them 456 don vi thi duoc hieu moi la bao nhieu?
Bai 5 ; Tim hieu cua hai so, biet rang so lon va so be cung bot di 100 don vi thi duoc hieu moi la 1000.
Cho 4 chu so 0 ; 1 ; 2 ; 3 . Hoi tu 4 chu so da cho :
a) Viet duoc tat ca bao nhieu so co 3 chu so khac nhau tu 4 chu so da cho ?
b) Co the viet duoc bao nhieu so co 3 chu so ?
c) Co the viet duoc bao nhieu so le co 3 chu so ma chu so hang chuc la 1 ?
d) Tim so lon nhat, so be nhat co 3 chu so khac nhau viet duoc tu 4 chu so da cho ?
tông cua 2 so la so nho nhat co 4 chu so . Nếu lấy số lon chia cho so be thi duoc thuong la so nho nhat co 1 chu so .Tim so lon?
Tìm một so biet rang lây số đó nhân với 3 dduoc bao nhieu dem cong voi 6 roi chia cho thi duoc ket qua la mot so co hai chu so ma tong cac chu so bang 9 va chu so hang don vi gap doi chu so hang chuc
Cac ban giai giup minh nanh nha minh se cho cac ban mot like
Cho 2 so co hieu la 81,6 . Biet so thu nhat nhan voi 3 , so thu hai nhan voi 2,5 thi duoc 2 tich co ket qua bang nhau . Tim so thu nhat ?
1.tim so bi chia trong phep chia cho 12 co thuong la 35 va so du la so le co 2chu so
2.hieu cua so lon nhat co 4 chu so khac nhau va so nho nhat co 4 chu sola bao nhieu
3.mot hinh chu nhat co chieu dai gap ruoi chieu rong. Neu moi chieu tang them 1m thi duoc hinh chu nhat moi co dien tich tang them 26m2. Tinh chu vi hinh chu nhat
4.trung binh cong cua 2 phan so bang 5/12. Phan so thu nhat hon phan so thu hai 1/6. Tim phan so thu nhat
5.tim y biet (5/7 - y) nhan 4/5 =7/10 + 1/2
6.hieu 2 so =1/3 so be.Tong 2 so la 63. Tim so be