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

72+36×2+24×3+18×4+12+6+168

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

=474

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.

dùng máy tính đi bn

tính nhanh mà

uk nhanh hơn tính tay nhìu

rễ ,chỉ cần gạch thôi

dễ lấy máy tính ra bấm là 618

=72+76+72+72+72+168=72x4+76+168=550

550 đó

bn ơi mk trc đó tk hộ đi

\(1235\text{×}6789\text{×}\left(630-315\text{×}2\right)\)

\(=1235\text{×}6789\text{×}\left(630-630\right)\)

\(=1235\text{×}6789\text{×}0=0\)

\(\left(100+67\right)\text{×}67+\left(200-38\right)\text{×}33\)

\(=167\text{×}67+167\text{×}33\)

\(=167\text{×}\left(67+33\right)\)

\(=167\text{×}100=16700\)

\(72+36\text{×}2+24\text{×}3+18\text{×}4+12\text{×}2+168\)

\(=72+72+72+72+24+168\)

\(=\left(72\text{×}4\right)+24+168=288+24+168=480\)

a) \(1235\times6789\times\left(630-630\right)\)

\(=1235\times6789\times0\)

\(=1235\times0\)

\(=0\)

b) \(167\times67+167\times33\)

\(=167\times\left(67+33\right)\)

\(=167\times100\)

=16700