a) 13 x 3 x 32
= 39 x 32
= 1248
b) 37 + 67
= 104
c) 63 x 39
= 2457
a) 13 x 3 x 32
= 39 x 32
= 1248
b) 37 + 67
= 104
c) 63 x 39
= 2457
1nhan2 cong 2 nhan3 ........ 39 nhan 40
viuet dang tong quat cac tinh chat giao hoan,ket hop cua phep cong, phep nhan,tinh chat phan phoi cua phep nhan doi voi phep cong
viet dang tong quat cac phep tinh giao hoan,ket hop cua phep cong,phep nhan,tinh chat phan phoi cua phep nhan doi voi phep cong
tinh cac bieu thuc sau
a)1/2 + -3/8 + 5/9
b) 13/-30+17/45+-7/18
c)-5/19+7/4-(-2/3)+5/6
mot xuong det co khoang tu 200 den 400 cong nhan , nhan dip cuoi nam can ket thuc cac hang muc , nen can chia to de lam viec , biet rang khi to 10 nguoi , to 12 nguoi hay to 15 nguoi deu thieu 2 nguoi . tinh so cong nhan cua xuong det
nhanh nha moi nguoi
ket hop phep cong a ] 997+37; b] 49+194; ket hop phep nhan a] 17.14 ; b] 25.28 ; tinh chat phan phoi phep nhan va phep cong a] 13.12 ; b] 53.11 ; c] 39.101 ;
khi dat tinh thuc hien phep nhan mot so tu nhien voi 208 hoc sinh da so y dat cac tich rieng thang cot voi nhau cong cac tich rieng nhu cong cac so tu nhien nen tim duoc tich sai bang 2860 em hay tim tich dung
tinh cac tong sau
a= 4 phan 3 nhan7 conh 4 phan 7 nhan 11 cong 4 phan 11 nhan 15cong chammm cong 4 phan 107 nhan 111
tim cac gia tri nguyen x sao cho bieu thuc p=2x-1/2x+1 nhan gia tri nguyen