72+36*2+24*3+18*4+12*6+168

=72+72+72+72+72+168

=72*5+168

=360+168

=528

72+72+72+72+72+168=72*5+168=360+168=528

72 + 36 * 2 + 24 * 3 + 18 * 4 + 12 + 6 + 168

= 72 + 72 + 72 + 72 + 12 + 6 + 168

= 72 * 4 + 12 + 6 + 168

= 288 + 12 + 6 + 168

= 474

Chúc bạn học tốt! ^_^

72+36x2+24x3+18x4+12+6+168

=72+72+72+72+12+6+168

=474

600 nha !

mik rất thích bài hát "Chưa bao giờ mẹ kể"

k mik nhé

2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 + 22 + 24 + 26 + 28 + 30 + 32 + 34 + 36 + 38 + 40 + 42 + 44 + 46 + 48 = 600

k em nha

Nay rảnh lại qua làm mấy bài lớp 4 ^^

Tui làm luôn kh ghi đề nhá

1, 

\(\frac{2}{3}+\frac{8}{15}=\frac{6}{5}\)

\(\frac{2}{5}+\frac{2}{3}=\frac{16}{15}\)

\(\frac{2}{3}+\frac{5}{6}=\frac{3}{2}\)

2, 

\(\cdot\frac{3}{7}+\frac{6}{5}+\frac{4}{7}\)

\(=\frac{3}{7}+\frac{4}{7}+\frac{6}{5}\)

\(=1+\frac{6}{5}\)

\(=\frac{11}{5}\)

\(\cdot\frac{6}{4}+\frac{7}{3}+\frac{4}{4}+\frac{3}{3}\)

\(=\frac{6}{4}+\frac{4}{4}+\frac{7}{3}+\frac{3}{3}\)

\(=\frac{10}{4}+\frac{10}{3}\)

\(=\frac{35}{6}\)

2, 

72 + 36 x 2 + 24 x 3 + 18 x 4 + 12 x 6 + 168

= 72 + 72 + 72 + 72 + 72 + 168

= 72 x 5 + 168

= 360 + 168

= 528

=528.

cứu

a) 10; 13; 18; 26; 36; 52...

c) 0; 1; 4; 9; 16; 25...

m) 1; 4; 9; 16; 25; 36; 49; 64...

p) 1; 3; 9; 27; 81; 243...