\(27.332+93.43+57.61+69.57\\ =27.332+93.43+57.\left(61+69\right)\\ =27.332+93.43+57.130\\ =8964+3999+7410=20373\\ 34.75+75.66-65.100\\ =\left(34+66\right).75-65.100\\ =100.75-65.100\\ =100.\left(75-65\right)\\ =100.10=1000\\ \left(456.11+912\right).37:13:74\\ =5928:13:\left(74:37\right)\\ =456:2=228\\ 6^2:4.3+2.5^2\\ =36:4.3+2.25\\ =9.3+50=27+50=77\\ 5.4^2-18:3^2\\ =5.16-18:9\\ =80-2=78\\\left[\left(315+372\right).3+\left(372+315\right).7\right]:\left(26.13+74.14\right)\\ =687.\left(3+7\right):\left(338+1036\right)\\ 687.10:1374\\ =6870:1374=5\\ 12:\left\{390:\left[500-\left(125+35.7\right)\right]\right\}\\ =12:\left[390:\left(500-370\right)\right]\\ =12:\left(390:130\right)=12:3=4\\ 192000-\left(1500.2+1800.3+1800.2:3\right)\\ =192000-\left(3000+5400+1200\right)\\ =192000-9600=182400\)

8578355

bạn sai rồi phải là 7723408 mới đúng

a)2500

b)2772

c)1974

d)347

e)1874

k mk nha

a,25x100=2500

b,

Bài 1:

1: =15+37+52-37-17=52-2=50

2: =38-42+14-25+27+15=62-42+29=20+29=49

Bài 1: Bỏ ngoặc rồi tính

3) (21-32) - (-12+32)=21-32-(-12)-32=21-32+12-32=-31

4) (12+21) - (23-21+10)=12+21-23+21-10=21

5) (57-725) - (605-53)=57-725-605+53=-1220

6) (55+45+15) - (15-55+45)=55+45+15-15+55-45=55+55=110

Bài 2: Tính các tổng sau một cách hợp lí

1) (-37) + 14 + 26 + 37=(-37+37)+(14+26)=0+40=40

2) (-24) +6 + 10 + 24=(-24+24)+(6+10)=0+16=16

3) 15 + 23 + (-25) + (-23)=(15-25)+(23-23)=-10+0=-10

4) 60 + 33 + (-50) + (-33)=(60-50)+(33-33)=10+0=10

5) (-16) + (-209) + (-14) + 209=(-16-14)+(-209+209)=-30+0=-30

6) (-12) + (-13) + 36 + (-11)=(-11-12-13)+36=-36+36=0

\(372-y=816:8=102\)

\(y=372-102=270\)

`816 :(372-y)=8`

`372-y=816:8`

`372-y=102`

`y=372-102`

`y= 270`

???

= [43 x ( 42 + 57 + 1)] - 90

= (43 x 100) -90

= 4300 - 90

= 4210

a,( 42 x 43 + 43 x 57 + 43 ) - 360 : 4

= [ 43 x ( 42 + 57 + 1 ) ] - 90

= [ 43 x 100 ] - 90 

= 4300 - 90

= 4210

b, 372 - 19 x 4 - 981 : 9 - 13

 = 372 - 76 - 109 - 13

= 174

c, 452 : 2 x 18 - 456 : 3  - 102

 = 226 x 18 - 152 - 102

 = 4068 - 152 - 102

 = 3814

58 - 39 = 19

98 - 57 = 41

285 - 274 = 11

784 - 584 = 200

58-39=19

98-57=41

285-274=11

784-584=200