`@` `\text {Ans}`

`\downarrow`

`A)`

`37 \times 46+37 \times 51+111`

`= 37 \times (46+51)+111`

`= 37 \times 97+111`

`= 3589 +111`

`= 3700`

`B)`

`35 \times 215-35 \times 210-175`

`= 35 \times (215-210)-175`

`= 35 \times 5-175`

`= 175-175=0`

`E)`

`76 \times 102-76 \times 2`

`= 76 \times (102-2)`

`= 76 \times 100`

`= 7600`

`C)`

`85 \times 94+85 \times 2 +170 \times 2`

`= 85 \times (94+2) + 170 \times 2`

`= 85 \times 96+170 \times 2`

`= 8160+340`

`= 8500`

`48 \times 56+28 \times 104`

`= 48 \times 28 \times 2+28 \times 104`

`= 28 \times (48 \times 2+104)`

`= 28 \times (96+104)`

`= 28 \times 200`

`= 5600`

`G)`

`206 \times 12-206-206`

`= 206 \times (12-1-1)`

`= 206 \times 10`

`= 2060`

a) 37 x 46 + 37 x 51 + 111

= 37 x ( 46 + 51 ) + 111

= 37 x 97 + 111

= 3589 + 111

= 3700

b) 35 x 215 - 35 x 210 - 175

= 35 x ( 215 - 210 ) - 175

= 35 x 5 - 175

= 175 - 175

= 0

e) 76 x 102 - 76 x 2

= 76 x ( 102 - 2 )

= 76 x 100

= 7600

c) 85 x 94 + 95 x 2 + 170 x 2

= 7990 + 2 x ( 95 + 170 )

= 7990 + 2 x 265

= 7990 + 530

= 8520

48 x 56 + 28 x 104

= 2688 + 2912

= 5600

g) 206 x 12 - 206 - 206

= 2472 - 206 - 206

= 2266 - 206

= 2060

\(24.17+52.76+24.35\)

\(=24.\left(17+35\right)+52.76\)

\(=24.52+52.76\)

\(=52.\left(76+24\right)\)

\(=52.100\)

\(=5200\)

   24 x 17 + 52 x 76 + 24 x 35

= 24 x ( 17 + 35 ) + 52 x 76

= 24 x 52 + 52 x 76

= 52 x ( 24 + 76 )

= 52 x 100

= 5200

         ~~~~~~~~~~Hok tốt~~~~~~~~~~

  24 x 17 + 52 x 76 + 24 x 35 

=24 x 17 + 52 x 3 x 24 + 24 x 35

=24 x 17 + 156 x 24 + 24 x 35

=24 x (17 + 156 + 35)

=24 x 208

=4932

đó là cách nhanh nhất

a: Ta có: 24+35+76+65+22

=(24+76)+(35+65)+22

=222

b: Sửa đề: \(24\cdot35+24\cdot65\)

=24x100

=2400

b) 35 x 24 + 35 x 76 +55 x 19 +55 x 91

= 35 x ( 24 + 76 ) + 55 x ( 19 + 91 )

= 35 x100 +55 x 100

= 100 x ( 55 + 35 )

= 90 x 100 =9 000

c) \(6\cdot25\cdot4+4\cdot19\cdot6-2\cdot14\cdot12\)

\(=24\cdot25+24\cdot19-24\cdot14\)

\(=24\left(25+19-14\right)\)

\(=24\cdot30=720\)

d) \(19\cdot64+76\cdot34\)

\(=76\cdot19+76\cdot34\)

\(=76\left(19+34\right)=76\cdot53=4028\)

a) 2 x 16 x 50 x 25

= ( 2 x 50 ) x ( 16 x 25 )

= 100 x 400 

= 40 000

Bài 2 : Tính nhanh

 a ) ( 8 , 7 x 29 +  8, 7 x 35 ) : 64

= [ 8.7 x ( 29 + 35 ) ] : 64

= [ 8.7 x 64 ] : 64

= 8.7

b ) 372 x 9 + 372

= 372 x ( 9 + 1 )

= 372 x 10

= 3720

c ) 37 x 24 + 37 x 76 + 63  x 79 + 63 x 21

= 37 x ( 24 + 76 ) + 63 x ( 79 + 21 )

= 37 x 100 + 63 x 100

= 100 x ( 37 + 63 )

= 100 x 100

= 10000

d ) 42 x 53 + 47 x 156 - 47 x 114

= 42 x 53 + 47 x ( 156 - 114 )

= 42 x 53 + 47 x 42

= 42 x ( 53 + 47 )

= 42 x 100

= 4200

hok tốt nha 

a) (8,7 x 29 + 8,7 x 35) : 64

= [8,7 x (29 + 35)] : 64

= (8,7 x 64) : 64

= 8,7 x (64 : 64)

= 8,7 x 1 = 8,7

b) 372 x 9 + 372 = 372 x (9 + 1)

= 372 x 10 = 3720

c) 37 x 24 + 37 x 76 + 63 x 79 + 63 x 21

= 37 x (24 + 76) + 63 x (79 + 21)

= 37 x 100 + 63 x 100

= (37 + 63) x 100

= 100 x 100 = 10000

d) 42 x 53 + 47 x 156 - 47 x 114

= 42 x 53 + 47 x (156 - 114)

= 42 x 53 + 47 x 42

= 42  x (53 + 47)

= 42 x 100

= 4200

 a ) ( 8 , 7 x 29 +  8, 7 x 35 ) : 64

= [ 8,7 x ( 29 + 35 ) ] : 64

=  8,7 x 64 : 64

= 8,7

b ) 372 x 9 + 372

= 372 x ( 9 + 1 )

= 372 x 10

= 3720

c ) 37 x 24 + 37 x 76 + 63  x 79 + 63 x 21

= [ 37 x ( 24 + 76 ) ] + [ 63 x ( 79 + 21 ) ] 

= [ 37 . 100 ] + [ 63 x 100 ] 

= 3700 + 6300

= 10000

d ) 42 x 53 + 47 x 156 - 47 x 114
= 42 x 53 + 47 x ( 156 - 114 )
= 42 x 53 + 47 x 42 
= 42 x ( 53 +  47 )
= 42 x 100
= 4200

Làm cho câu a thôi nha ! Ngại đánh máy ☻

a . 5 x 3² - 4 x 2³ + 35 : 7

= 5 x 9 - 4 x 8 + 5

=  45 - 32 + 5

=     13 + 5 

= 18

Cô Hoài ơi, cô trả lời tin nhắn em với ạ!

a, (-25) + 276 - (276 - 25)

= (-25) + 276 - 276 + 25

= [ (-25) + 25] - (276 - 276)

= 0 - 0

 = 0

b, 24 x 46 + 24 x 53 + 24 

= 24 x ( 46 + 53 + 1)

= 24 x 100

= 2400

c, 145 + 20 - 45 + 180

= (145 - 45) + (20 + 180)

= 100 + 200

= 300

d; 12 x 36 + 12 x 65 - 12

= 12 x ( 36 + 65  - 1)

= 12 x (100)

= 1200

  3x8x76+2x35x12-4x11x6

= 24x76+24x35-24x11

= 24x(76+35-11)

=24x100

= 2400

3 x 8 x  76 + 2 x 35 x 12 - 4 x 11 x 6

= ( 3 + 2 ) x ( 8 + 35 ) x ( 76 + 12 )  - 4 x 11 x 6

= 5 x 43 x 88 - 4x 11 x 6

= ( 5-4 ) x ( 43 - 11 ) x ( 88 - 6 )

= 1 x 32 x 82

= 2624

3.8.76+2.35.12-4.11.6

=1824+840-264

=2664-264

=2400

Ta có: A = 4,5 x 35 + 0,5 x 46 x 9 - 3,5 x 81

              = 4,5 x 35 + 4,5 x 46 - 4,5 x 63

              = 4,5 x ( 35 + 46 - 63)

              = 4,5 x 18 

              = 81

A=4,5x35+0,5x46x9-3,5x81

=157,5+207-283,5

=-123,3

A = 4,5 x 35 + 0,5 x 46 x 9 - 3,5 x 81

A=0,5x9x35+0,5x46x9-0,5x7x9

A=0,5x9x(35+46-7x9)

A=0,5x9x(35+46-63)

A=0,5x9x18

A=81