1240

60.49

tik mik nha

1) 12,4x72,53+27,47x12,4

= 12,4x(72,53+27,47)

= 12,4 x 100

=1240

2) 32,42+ 10,49+ 17,58

= (32,42+17,58) + 10,49

= 50 + 10,49

= 60,49

12,4 x 72,53 + 27,47 x 12,4

=12,4x(72,53+27,47)

=12,4x99,99

=1239,876

32,42 +10,49 + 17,58

=(32,42+17,58)+10,49

=50+10,49

=60,49

giúp mình với 

b) 32,42 + 10,49 + 17,58

= ( 32,42+17,58 ) + 10,49

= 50 + 10,49

=  60,49

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

a) 12,4 x 72,53 + 27,47 x 12,4

= 12,4×(72,53+27,47)

=12,4×100

=1240

= 12,4 × (72,53 + 27,47)

= 12,4 × 100

= 124

3,42+10,49+17,58

=(3,42+17,58)+10,49

=21+10,49

=31,49

17,6-5,3-7,6+15,3-6,8

=(17,6-7,6)+(15,3-5,3)-6,8

=10+10-6,8

=20-6,8

=13,2

8,99+8,98+8,96+0,1

=(8,99+0,1)+8,98+8,96

=9+17,94

=26,94

.

8,99+8,98+8,97+9,96+0,1.

=9+26,91

=35,91

~ sorry ~

3,42+10,49+17,58
=(3,42+17,58)+10,49
=21+10,49
=31,49
17,6-5,3-7,6+15,3-6,8
=(17,6-7,6)+(15,3-5,3)-6,8
=10+10-6,8
=20-6,8
=13,2

17.58 x 43 + 17.58 x 56 + 1.758 x 10

= 17.58 x (43 + 56) + 1.758 x 10

= 1740.42 + 17.58

= 1758

17,58 x 43 + 17,58 x 56 + 1,758 x 10

= 17,58 x 43 + 17,58 x 56 + 17,58

= 17,58 x (43 + 56 + 1)

= 17,58 x 100

= 1758

=17,58x43+17,58x56+17,58

=17,58x(43+56+1)

=17,58x100

=1758

k minh nha 

a: =36,5x2+36,5x9-36,5

=36,5x10

=365

36,5 : 0,5 + 36,5 \(\times\) 9 -36,5

\(=36,5.2+36,5\times9-36,5\)

\(=36,5\times\left(2+9-1\right)\)

\(=36,5\times10\)

\(=365\)

lm theo cách này nhé :\

36,5 : 0,5 + 36,5  9 -36,5

36,5x2+36,5x9-36,5

=36,5x10

=365

oki :)

a. 125 x 25 x 8

=(125x8) x25

=    1000 x25

= 25000

a. 125 x 25 x 8

= ( 125 x 8 ) x 25 

= 1000 x 25

= 25000

=1000x25=25000

\(50\%+\dfrac{7}{12}-\dfrac{1}{2}\)

\(=\dfrac{1}{2}+\dfrac{7}{12}-\dfrac{1}{2}\)

\(=\left(\dfrac{1}{2}-\dfrac{1}{2}\right)+\dfrac{7}{12}\)

\(=\dfrac{7}{12}\)

_______________

\(2022\cdot67+2022\cdot43-2022\cdot10\)

\(=2022\cdot\left(67+43-10\right)\)

\(=2022\cdot100\)

\(=202200\)

_____________________

\(10,3+6,9+8,7+13,1\)

\(=\left(13,1+6,9\right)+\left(10,3+8,7\right)\)

\(=20+19\)

\(=39\)

___________________

\(17,58\times43+57\times17,58\)

\(=17,58\times\left(43+57\right)\)

\(=17,58\times100\)

\(=1758\)

tớ ghi sai nên cập nhật lại câu hỏi, phần 3 các bạn trả lời sớm mà bị sai thì bỏ qua cho tớ nhé

\(50\%+\dfrac{7}{12}-\dfrac{1}{2}=\dfrac{1}{2}+\dfrac{7}{12}-\dfrac{1}{2}=\left(\dfrac{1}{2}-\dfrac{1}{2}\right)+\dfrac{7}{12}=\dfrac{7}{12}\)

\(2022\cdot67+2022\cdot43-2022\cdot10=2022\cdot\left(67+43-10\right)=2022\cdot100=202200\)

\(11,3+6,9+8,7+13,1=\left(11,3+8,7\right)+\left(6,9+13,1\right)=20+20=40\)

\(17,58\cdot43+57\cdot17,58=17,58\cdot\left(43+57\right)=17,58\cdot100=1758\)

`=1,25xx(1+2+7)=1,25xx10=12,5`

a) = 1,25 x ( 2 + 7 + 1 )

= 1,25 x 10

= 12,5

12,5