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

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

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

= 1,25 x 10

= 12,5

12,5

(36 + 54) × 7 + 7 × 9 + 7

= 90 × 7 + 7 × 9 + 7

= (90 + 9 + 1 ) × 7

= 100 × 7

= 700

A = 700

A.  164,7 * 0,91 - 64,7 * 0,91
A = (164,7 - 64,7) * 0,91
A =        100          * 0,91
A =               91
B.   2,5 * 12,5 * 8 * 0,4
C1: B = (2,5 * 0,4) * (12,5 * 8)
      B =        1        *     100
C2: B = (2,5 * 8) * (12,5 * 0,4)
       B =     20     *         5
       B =               100

\(a,\\7,82+1,47+0,18\\=(7,82+0,18)+1,47\\=8+1,47\\=9,47\\---\\b,\\2,71+5,9+1,29+33,1\\=(2,71+1,29)+(5,9+33,1)\\=4+39\\=43\\\text{#}Toru\)

a: 7,82+1,47+0,18

=7,82+0,18+1,47

=8+1,47

=9,47

b: 2,71+5,9+1,29+33,1

=2,71+1,29+5,9+33,1

=4+39

=43

thanks

a: =20x71=1420

\(a.=\left(4345+3845\right):126\\ =8190:126=65\\ b.=\left(24563-12215\right):126\\ =12348:126=98\)

\(a,4345:126+3845:126=\left(4345+3845\right):126=8190:126=65\\ b,24563:126-12215:126=\left(24563-12215\right):126=12348:126=98\)

a.=(4345+3845):126=8190:126=65b.=(24563−12215):126=12348:126=98

Cái gì khó có gg ok

a)   175× 582-25 ×582

= ( 175 - 25 ) x 582

= 150 x 582

= 87300

b)   81 × 365 + 18 ×365 +365

=  81 × 365 + 18 × 365 + 365 x 1

= ( 81 + 18 + 1 ) x 365

= 100 x 365

= 36500

a) \(175\times582-25\times582\)

\(=582\times\left(175-25\right)\)

\(=582\times150\)

\(=87300\)

b) \(81\times365+18\times365+365\)

\(=81\times365+18\times365+365\times1\)

\(=365\times\left(81+19+1\right)\)

\(=365\times100=36500\)