??????????????????????

= (8.125). (25.4).3³

=  1000. 100.9
= 100 000.9
= 900 000

8.4.3^3.125.25

=(8.125).(25.4).27

=1000.100.27

=2100000

a)    \(73\left(8-59\right)-59\left(8-73\right)\)

\(=73.8-73.59-59.8+59.73\)

\(=8.\left(73-59\right)\)

\(=8.14=112\)

b)    \(199\left(15-17\right)-199\left(-17+5\right)\)

\(=199.15-199.17+199.17-199.5\)

\(=199.\left(15-5\right)\)

\(=199.10=1990\)

a) 73.(8-59) - 59.(8-73)

= 73 . 8 - 73 . 59 - 59 . 8 + 59 . 73

= - 73 . 59 + 59 . 73 + 73 . 8 - 59 . 8

= 0 + 8 ( 73 - 59 )

= 8 . 14

= 112

b)199.(15-17) - 199.( -17 + 5 )

= 199 . 15 - 199 . 17 - 199 . (- 17 ) + ( - 199 ) . 5

= 199 . 15 - 19 . 17 + 199 . 17 + ( - 199 ) . 5

= 199 . 15 - 0 + 199 . ( - 5 )

= 199 . [ 15 - ( - 5 ) ]

= 199 . 10

= 1990

à nó bị trùng một chút nhé

hơi sai sai

hơi vấn đề thật

Giải;

1) \(347.222-222.\left(216+184\right):8\) 

\(=347.222-222.400:8\) 

\(=347.222-222.50\) 

\(=222.\left(347-50\right)\) 

\(=222.297\)

\(=65934\) 

2) \(132-\left[116-\left(132-128\right).22\right]\) 

\(=132-\left[116-4.22\right]\) 

\(=132-\left[116-88\right]\) 

\(=132-28\) 

\(=104\) 

3) \(16:\left\{400:\left[200-\left(37+46.3\right)\right]\right\}\) 

\(=16:\left\{400:\left[200-\left(37+138\right)\right]\right\}\) 

\(=16:\left\{400:\left[200-175\right]\right\}\) 

\(=16:\left\{400:25\right\}\) 

\(=16:16\) 

\(=1\) 

4) \(\left\{184:\left[96-124:31\right]-2\right\}.3651\) 

\(=\left\{184:\left[96-4\right]-2\right\}.3651\) 

\(=\left\{184:92-2\right\}.3651\) 

\(=\left\{2-2\right\}.3651\) 

\(=0.3651\) 

\(=0\) 

5) \(46-\left[\left(16+71.4\right):15\right]-2\) 

\(=46-\left[\left(16+284\right):15\right]-2\) 

\(=46-\left[300:15\right]-2\)

 \(=46-20-2\) 

\(=24\)

6) \(3^3.18+72.4^2-41.18\) 

\(=18.\left(27-41\right)+72.16\) 

\(=18.-14+1152\) 

\(=-252+1152\) 

\(=900\)

Giải: (tiếp)

7) \(\left(56.46-25.23\right):23\) 

\(=\left(2576-575\right):23\) 

\(=2001:23\) 

\(=87\) 

8) \(\left(28.54+56.36\right):21:2\) 

\(=\left(1512+2016\right):21:2\) 

\(=3528:21:2\) 

\(=84\) 

9) \(\left(76.34-19.64\right):\left(38.9\right)\) 

\(=\left(2584-1216\right):342\) 

\(=1368:342\) 

\(=4\) 

10) \(\left(2+4+6+...+100\right).\left(36.333-108.111\right)\) 

\(=\left(2+4+6+...+100\right).\left(11988-11988\right)\) 

\(=\left(2+4+6+...+100\right).0\) 

\(=0\) 

11) \(\left(5.4^{11}-3.16^5\right):4^{10}\) 

\(=5.4^{11}:4^{10}-3.16^5:4^{10}\) 

\(=5.4-3.1\) 

\(=20-3\) 

\(=17\) 

12) \(7256.4375-725:3650+4375.7255\) 

\(=4375.\left(7256+7255\right)-\dfrac{29}{146}\) 

\(=4375.14511-\dfrac{29}{146}\) 

\(=63485624,8\) 

Câu 12 ko chắc!

\(=\dfrac{9}{23}\left(\dfrac{5}{17}-\dfrac{22}{17}\right)+11+\dfrac{9}{23}=11\)

a) 45.37 + 45.63 - 100

\( 45.(37 + 63) – 100 \)

\(45.100 – 100\)

 \(100.(45 – 1) \)

\( 100 . 44 = 4400\)

a,-9

b,116.42

c,300

d,21

a)\(=45.\left(37+63-\dfrac{20}{9}\right)=45\cdot\dfrac{880}{9}=4400\)

b)\(=148.9-9.48=9.\left(148-48\right)=9.100=900\)

    7 3 + − 5 6 + − 2 3 = 7 3 + − 5 6 + − 2 3 = 7 3 + − 2 3 + − 5 6 = 5 3 + − 5 6 = 10 + − 5 6 = 5 6