tinh 212x35-46x272 phan (22x3)6+44x35 - 510x73-255x492 phan (125x7)3+1253x75
tinh 212x35-46x272 phan (22x3)6+44x35 - 510x73-255x492 phan (125x7)3+1253x75
Tinh 2015/2016:(0,4-2/9+2/11 phan 1,4-7/9+7/11x-1va 1/6+0,875-0,7 phan 1/3-0,25+1/5)
C= 19 phan 25(3 phan 7 +25 phan 19)-3phan 7(19 phan 25-7 phan 3)
tinh nhanh neu co the
tinh gia tri bieu thuc C= hon so 5 va 9 phan 10 chia 3 phan 2 - { 2 va 1 phan 3 nhan 4 va 1 phan 2 - 2 nhan 2 va 1 phan 3 } chia 7 phan 4
Thuc hien phep tinh :
a) 4 phan 5 + -7 phan 15 . 1, 25
b) 2 phan 5 + 3 phan 5 . ( 4 1phan2 - 3,25)
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
mot manh dat duoc chia lam 3 phan . Phan de xay nha co dien tich chiem 3/5 dien tich manh dat .Phan de lam san co dien tich bang 24% dien tich manh dat .Phan dien tich con lai la 24 m vuong de trong cay canh .
tinh dien tich manh dat
tinh dien tich phan at de lam nha
mot nha may co 3 phan xuong . so cong nhan cua phan xuong 1 bang 36% tong so cong nhan nha may so cong nhan cua phan xuong 2 bang 3/5 so cong nhan cua phan xuong 3 . biet so cong nhan cua phan xuong 3 hon so cong nhan cua phan xuong 1 la 18 nguoi . tinh so nguoi moi phan xuong
