6,70≈7
8,45≈8
2,119≈2
9,092≈9
0,05≈0,1
29,88≈30
9,99≈10
\(6,70\approx7.\)
\(8,45\approx8.\)
\(2,119\approx2.\)
\(6,092\approx6.\)
\(0,05\approx0,1.\)
\(0,035\approx0,04.\)
\(29,88\approx29.\)
\(9,99\approx10.\)
Chúc bạn học tốt!
\(6,7\approx7\)
\(8,45\approx8\)
\(2,119\approx2\)
\(6,092\approx6\)
\(0,05\approx0\)
\(0,035\approx0\)
\(29,88\approx30\)
\(9,99\approx10\)
Cho cac so thap phan vo han tuan hoan duoc viet duoi dang chu ki sau: 0,(35); 1,235; 1,2(51)
Hay viet chung duoi dang phan so.
Bai 1: so sanh 31^11 va 17^14
Bai2: So hoc sinh khoi 6,7,8,9 cua mot truong THCS ti le vs cac so 9;8;8;6. Biet rang tong so hoc sinh khoi 8 va khoi 9 it hon tong so hoc sinh khoi 6 va khoi 7 la 120 hoc sinh. Tinh so hoc sinh moi khoi?
Bai3: bai toan ap dung tinh chat cua day ti so bang nhau :
Tim dien tich cua mot hinh chu nhat biet i so giua chieu dai va chieu rong cua hinh chu nhat do la 3/2 va chu vi hinh chu nhat la 20 met.
Giup mk vs mai mk nop r! Can gap!
bieu dien cac so do tren truc so neu nhan xet ve vi tri cua 2 so do doi voi nhau doi voi 0
tim 3 so nguyen duong sao cho tong cac nhgich dao cua chung bang 2
Tim cac so huu ti a va b biet rang hieu a-b bang thuong a:b va bang hai lan tong a+b
sap sep cac so thuc: -3,2; 1; -1/2; 7,4; 0; -1,5
a) theo thu tu tu nho den lon
b) theo thu tu tu nho den lon cua cac gia tri tuyet doi cua chung
tim x ,biet
a)3,2.x+(-1,2).x+2,7=-4,9
b)-5,6.x+2,9.x-3,86=-9,8
6,5+ 1,2+3,5-5,2+6,5-4,8
(-4,3.1,1+1,1.4,5): (-0,5:0,05+10,01)
(6,7+5,66-3,7+4,34). (-76,6.1,2+7,66.12)
Tim GTNN cua BT sau:
a, lx-2l+lx+28l+lx-60l
b, lxl+lx-1l+lx-2l+...+lx-2004l
Cac ban giai chi tiet giup minh nha.
lam bai tap :51,52,50(SGK\101)
