\(3,54\times73+0,46\times25+3,54\times26+0,46\times75+3,54\)

\(=3,54\times\left(73+26+1\right)+0,46\times\left(25+75\right)\)
\(=3,54\times100+0,46\times100\)

\(=354+46=400\)

Đáp án là : 400

( x - 8)² = | - 75 | - ( - 46)

( x - 8 )² = 75 + 46

( x - 8 )² = 121

( x - 8 )² = 11²

  x - 8     = 11

  x           = 19

\(\left(x-8\right)^2=75+46\)

\(\left(x-8\right)^2=121\Rightarrow x-8=11\Rightarrow x=19\)

a, 49 x 385 - 39 x 385

= 385 x ( 49 - 39)

= 385 x 10

= 3850

b, 46 x 17 + 38 x 46 + 46 x 44 + 46

= 46 x 17 + 38 x 46 + 46 x 44 + 46 x 1

= 46 x (17 + 38 + 44 + 1)

= 46 x 100

= 4600 

`a, 36 + 14 + 9`

`= 50 + 9`

`= 59`

`b, 51 + 12 + 18`

`=51 + 30`

`= 81`

`c, 65 + 9 + 5`

`= 70 + 9`

`= 79`

`d, 31 + 26 + 69`

`= 100 + 26`

`= 126`

25 x 14 + 25 x 32 + 46 x 75

= 25 x 14 + 25 x 32 + 46 x 25 x 3

= 25 x 14 + 25 x 32 + 25 x 138

= 25 x ( 14 + 32 + 138 )

= 25 x 184

= 4600.

# Học tốt #

25 x 14 + 25 x 32 + 46 x 75

= 25 x 14 + 25 x 32 + 46 x 25 x 3

= 25 x 14 + 25 x 32 + 25 x 183

= 25 x ( 14 + 32 + 138 )

= 25 x  184

= 4600.

Hok tốt

        \(\frac{12.23+23.88}{46.3+46.14}\)

\(=\frac{23.\left(12+88\right)}{46.\left(3+14\right)}\)

\(=\frac{23.100}{46.17}\)

\(=\frac{23.2.50}{23.2.17}\)

\(=\frac{50}{17}\)

\(\frac{12x23+23x88}{46x3+46x14}\)

=\(\frac{23x\left(12+88\right)}{46x\left(14+3\right)}\)

=\(\frac{23x100}{46x17}\)

= \(\frac{50}{17}\)

=46x (17+38+1+44)=46(17+38+1+44)

=4600=4600

46 x 17 - 38 x 46 - 26 x 44 - 46 

= 782 - 1748 - 1144 - 46

= -966 - 1098

= -2064 nhé

a. 4² . 46 + 4² . 52

= 4² . (46+52)

= 16 . 98

= 1568

b. -75+58+(-25)

= [-75+(-25)]+58

= -100+58

= -42

c. -4 . 5 . (-25)

= [-4 . (-25)] . 5

= 100 . 5

= 500

= ( 3,54 x 73  +  3,54 x 27) + ( 0,23 x 46+ 0,77 x 46)

= 3,54 x ( 73 + 27 ) + 46x ( 0,23 + 0,77)

= 3,54 x 100 + 46 x  1

= 354 + 46 

= 400