A = 30 : 3 = 10
B = ( 18 - 10 ) : 2 = 4
C = 4 - 2 = 2
A + B + C = 10 + 4 + 2
= 16
A + B + C = 16
A = 30 : 3 = 10
B = (18 - 10) : 2 = 4
C = 4 - 2 = 2
A +B + C = 2 + 4 + 10 = 16
thay cac chu a b c bang nhung so thich hop trong phep tinh sau co giai thich
abc*5=dad
1 hinh thang co tong do dai 2 day la 42 cm,chieu cao bang day be , day be bang 3 phan 4 day lon . tinh dien tich hinh thang
mong cac ban hay giai cho minh ma hay co loi giai phep tinh va dap so nhe ban nao giup minh thi minh thich ca
cho hinh thang abcd co kich thuoc nhu hinh ve ben ab=9 bh=8 hc=2 .Biet dien tich hinh tamgiac bdc bang 60 m2 tinh a do dai canh dc b dien tich hinh thang abcd c dien tich hinh tam giac bdh
Cho hinh thang ABCD ( hinh ve ben ) co kich thuoc nhu sau: AB=20cm, AH=12cm, CD=30cm, CE=16cm. a) tinh dien tich hinh thang ABCD. b) tinh dien tich hinh tam giac BDE. c) dien tich hinh tam giac BDE bang bao nhieu phan tram dien tich hinh thang ABCD.
1.Tinh gia tri phan so
2 x 3 x 4 x 6 + 4 x 18 + 4 x 54 + 18 x 36 / 2 x 3 x 5 + 2 x 45 + 10 x 27 + 18 x 45
2.Thay cac dau ? boi cac chu so va dau phep tinh thich hop
3?562?1 ? ?6?023? = 7546?19
dau hoi o giua la dau phep tinh nha
co the loai tru duoc dau chia
ai dung minh se tick
minh can gap
bai 1 thay cac chu so a,b,c,d bang cac chu so thich hop
ab,0 + cd,4 = 158,4
ab,0 - cd,4 = 15,6
thay cac chu a,b bang cac chu so thich hop de duoc cac so vua chia het cho 3 vua chia het cho 5
a)426a b)673b
cho hinh thang abcd nhu hinh ve,day lon bang 3,6cm,day nho bang 2/3 day lon,chieu cao ah=2cm
a) tinh S hinh thang abcd
b) tinh do dai ah,biet S hinh tam giac adh bang 25% dien tich hinh tam giac ahc
ket qua dieu tra ve su ua thich hoc cac mon cua 400 hoc sinh duoc cho tren bieu do hinh quat ben : ( SGK trang 96 , tap 2A )
Hay cho biet trong so cac em duoc dieu tra co bao nhieu hoc sinh thich boi ?
A.60 h/s B.80 h/s C.100 h/s D.160 h/s
