5x5 bằng???
Kb nha
5x5=?
ms chs kb nha mn
5x5-=???
ai tren 11 diem kb vs mik nha
5x5=??
Ai tren 11 diem kb vs doi tik nha
5x5:5=?????
Ai tren 11 diem kb vs mik nha
chán quá!!! kb mk nha
5+5-5x5:5=???
nhanh mk tik
5x5=???
Ai kb vs mik mik tik cho nha (tren 11 diem)
5x5=???
Ai tik mik mik tik lai (kb mik tik cho)
5x5+15=?
6x7+8=?
7x8+15=?
Ai làm nhanh tick nha!!
5 x 5 + 15
= 25 + 15
= 40
6 x 7 + 8
= 42 + 8
= 50
7 x 8 + 15
= 56 + 15
= 71
5 x 5 +15 = 25 + 15 = 40.
6 x 7 + 8 = 42 + 8 = 50.
7 x 8 + 15 = 56 + 15 = 71.
tính bằng cách thuận tiện
2/9+3/7+16/9+4/7
3/5x5/9+34x4/9
mong mọi người viết tất cả ra hộ mik nha
\(\frac{2}{9}+\frac{3}{7}+\frac{16}{9}+\frac{4}{7}\)
\(=\left(\frac{2}{9}+\frac{16}{9}\right)+\left(\frac{3}{7}+\frac{4}{7}\right)\)
\(=2+1=3\)
\(\frac{3}{5}\times\frac{5}{9}+\frac{3}{4}\times\frac{4}{9}\)
\(=\frac{1}{3}+\frac{1}{3}=\frac{2}{3}\)
bài 1 So sánh
327/326 và 326/325
\(\frac{2}{9}\)+\(\frac{3}{7}\)+\(\frac{16}{9}\)+\(\frac{4}{7}\)=\(\frac{731}{189}\)
\(\frac{3}{5}\)x\(\frac{5}{9}\)+ 34 x\(\frac{4}{9}\)=\(\frac{103}{3}\)