tim 2 so biet rang hieu 2 so la 12 neu tang moi so them 3 don vi thi duoc 2 so moi co ti so la 3/5
tim 2 so biet rang ,hieu 2 so la 5 neu tang moi so them 2 don vi thi duoc 2 so moi co ti so 3/4
Khi tăng mỗi số thêm 2đv thì hiệu không thay đổi
Hiệu số phần bằng nhau:4-3=1 phần
Số bé: 5:1*3=15
Số lớn:5:1*4=20
Đ s:
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.
1: 1334
2:1614
3:1435
4:544
5:800
T I C K ĐÚNG CHO MIK NHA
Tim hieu cua hai so, biet rang neu so lon tang them 1470 don vi va so be tang them 25830 don vi thi duoc hieu moi la 12340.
hieu 2 so la 20 neu tang moi so them 6 don vi thi co ti so la 3/5 tim 3 so
vi neu tang so lon 6 don vi thi so be kh doi
hieu 2 so luc sau la
20+6=26
so be ban dau la
26:(5-3)*3=39
so lon ban dau la
39+26=35
d/s
tim 2 so tu nhien co hieu la 45 biet rang neu them vao so lon 15 don vi va giam so be di 8 don vi thi duoc 2 so moi co thuong bang 5
Bai 1: tich cua 2 so ,biet rang neu giu nguyen thua so thu nhat va tang thua so thuhai len 4 lan thi duoc tich moi la 8400
Bai 2: Tim 2 so co tich bang 5292 ,biet rang neu giu nguyen thua so thu nhat va tang thua so thu hai them 6 don vi thi duoc tich moi bang 6048
tim hieu cua hai so biet rang neu tang so bi tru them123 don vi va giam so tru di 456 don vi thi duoc hieu moi la 7890
mot phep tru co hieu la 345, biet rang neu tang so bi tru 12 don vi va tang so tru len gap doi ,thi hieu moi se la 67. tim so bi tru va so tru
Tong cua 2 so la 425 . Neu cung them vao moi so 5 don vi thi duoc 2 so co hieu la 15 don vi . Tim so be