=180+144-216+144

=144+(216-180)

=144+36

=180

Đ/S : 180

=180 nha ban 

   36 x 5 + 72 x 2 - 216 + 144

= 36 x 5 + 36 x 2 x 2 - 36 x 6 + 36 x 4

= 36 x ( 5 + 2 + 2 - 6 + 4 )

= 36 x       5

=    180

a) (25x32) : 8           

= 25 x (4 x 8) : 8

= (25 x 4) x (8:8)

= 100 x 1

=100

b, 24 x 11 + 6 x 86 x 4 + 72

= 24 x 11 + (6 x 4) x 86 + 24 x 3

= 24 x 11 + 24 x 86 + 24 x 3

= 24 x (11+86+3)

= 24 x 100

= 2 400

\(\left(25\times32\right):8=25\times32:8=25\times\left(32:8\right)=25\times4=100\\ 24\times11+6\times86\times4+72\\ =24\times11+24\times86+24\times3\\ =24\times\left(11+86+3\right)\\ =24\times100=2400\\ 36\times5+9\times79\times4+72\times8\\ =36\times5+36\times79+36\times16\\ =36\times\left(5+79+16\right)\\ =36\times100=3600\\ \left(56\times125\right):7=56\times125:7=\left(56:7\right)\times125=8\times125=1000\)

Thế kỷ 16 là khoảng thời gian tính từ thời điểm năm 1501 đến hết năm 1600

tính 

 36 *7 - 72 +35 *5

= 36 * 7 - 36*2 + 36*5

= 36 * ( 7-2+5 )

= 36 *10

= 360

Thế kỷ 16 là khoảng thời gian tính từ thời điểm năm 1501 đến hết năm 1600

tính 

 36 *7 - 72 +35 *5

= 36 * 7 - 36*2 + 36*5

= 36 * ( 7-2+5 )

= 36 *10

= 360

360

5x36x2=(5x2)x36=10x36=360

5 x 36 x 2

= 36x (5 x 2)

= 36 x 10 = 360

500 x 36 - 72 x 250+ 4150

=500 x 36 - 36 x 500 +4150

=0+4150

=4150

500 x 36 - 72 x 250+ 4150

= 500 x 36 - 36 x 500 +4150

= 0+4150

= 4150

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

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

\(=1235\text{×}6789\text{×}0=0\)

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

\(=167\text{×}67+167\text{×}33\)

\(=167\text{×}\left(67+33\right)\)

\(=167\text{×}100=16700\)

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

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

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

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