cho mk hoi bang don vi do khoi luong va tra loi cau hoi:
40 dag = 400 ?
Mot hinh chu nhat cho chu vi bang 798. Biet chieu dai va chieu rong duoc do bang don vi do la met. Tinh dien tich hinh chu nhat do
bang don vi do thoi gian
mot khu dat hinh chu nhat co chu vi bang 360 dm . Chieu rong bang 4/5chieu dai . Tinh dien tich khu dat do ra don vi met vuong
Tich cua hai so bang 450 , biet neu tang thua so thu nhat them 4 don vi thi tich tang them 162 don vi. Tim hai so do
TIM TICH CUA HAI SO TU NHIEN, BIET NEU GIAM THUA SO THU NHAT DI 6 DON VI THI TICH GIAM DI 486 DON VI,CON NEU TANG THUA SO THU HAI THEM 4 DON VI THI TICH TANG THEM 424 DON VI.
TICH HAI SO DO BANG.
tich cua hai so bang 450 biet neu tang thua so thu nhat tang them 9 don vi thi tich tang them 162 don vi tim 2 so do
hieu cua hai bang 784 tim hai so do biet rang neu them vao so lon hon 1230 don vi thi tong cua chung bang bang 14682
dat câu voi tu cân co nghia sau day : hoat dong do khoi luong cua cân