1) Co hai thùng dau.Neu chuyen 16l tu thung to sang thung nho thi so dau o hai thung bang nhau neu chuyen 1 l tu thung nho sang thung to thi thung gap to gap thung nho .Tinh so dau cua moi thung 2) x+x:0,5+x:0,25=143) mot hinh thang co dien tich 110cm vuong hieu do dai hai day =6cm . neu tang day lon them 3cm thi dien tich hinh thang se tang them 15cm vuong hay tinh a) chieu cao cua hinh thang b) do dai cua moi day cua hinh thang4)...
Đọc tiếp
1) Co hai thùng dau.Neu chuyen 16l tu thung to sang thung nho thi so dau o hai thung bang nhau neu chuyen 1 l tu thung nho sang thung to thi thung gap to gap thung nho .Tinh so dau cua moi thung
2) x+x:0,5+x:0,25=14
3) mot hinh thang co dien tich 110cm vuong hieu do dai hai day =6cm . neu tang day lon them 3cm thi dien tich hinh thang se tang them 15cm vuong hay tinh
a) chieu cao cua hinh thang
b) do dai cua moi day cua hinh thang
4) 129,68*9.3+1296.8*0.07
2:
x+x:0,5+x:0,25=14
=>x+2x+4x=14
=>7x=14
hay x=2