a) ( -32 ) . ( -56 ) + 32.44

= 32 . 56 + 32 . 44 

= 32  . ( 56 + 44 )

=  32 . 100

= 3200

b) Làm tương tự như phần a nhé !

Kết bạn nhé !

a) \(\left(-32\right)\cdot\left(-56\right)+32\cdot44\)

\(=32\cdot56+32\cdot44\)

\(=32\cdot\left(56+44\right)\)

\(=32\cdot100\)

\(=3200\)

b) \(\left(-59\right)\cdot\left(-56\right)-59\cdot53\)

\(=59\cdot56-59\cdot53\)

\(=59\cdot\left(56-53\right)\)

\(=59\cdot3\)

\(=177\)

https://www.google.com.vn/search?q=google+calculator&rlz=1C1GGRV_enVN751VN751&oq=google+cal&aqs=chrome.2.0j69i57j0l4.5783j0j7&sourceid=chrome&ie=UTF-8

Vào đó tính

32 . 75 + 68 . 84 + 65 . 32 + 68 . 56

= 32 . ( 75 + 65 ) + 68 . ( 84 + 56 )

= 32 . 140 + 68 . 140

= 140 . ( 32 + 68 )

= 140 . 100

= 14000

32 x 75 + 68 x 84 + 65 x 32 + 68 x 56

= ( 32 x 75 ) + ( 65 x 32 ) + ( 68 x 84 ) + ( 68 x 56 )

= 32 x ( 75 + 65 ) + 68 x ( 84 +56 )

= 32 x 140 + 68 x 140

= 140 x ( 32 + 68 ) 

= 140 x 100

= 14000

A = \(\dfrac{18}{26}\) + (-\(\dfrac{5}{27}\)) + (-\(\dfrac{22}{86}\)) + \(\dfrac{12}{39}\) - \(\dfrac{32}{43}\)

A = \(\dfrac{9}{13}\) - \(\dfrac{5}{27}\) -  \(\dfrac{11}{43}\) + \(\dfrac{4}{13}\) - \(\dfrac{32}{43}\)

A = (\(\dfrac{9}{13}\) + \(\dfrac{4}{13}\)) - (\(\dfrac{11}{43}\) + \(\dfrac{32}{43}\)) - \(\dfrac{5}{27}\)

A = \(\dfrac{13}{13}\) - \(\dfrac{43}{43}\) - \(\dfrac{5}{27}\)

A = 1 - 1 - \(\dfrac{5}{27}\)

A = 0 - \(\dfrac{5}{27}\)

A = - \(\dfrac{5}{27}\)

a ) x + 36 =98

x = 98 -36

x = 62

x * 8 = 56

x = 56 : 8 

x = 7

b ) 16 + 32 = 48

39 + 25 = 64

c) tính nhanh :

36 + 69 + 31 + 64

= ( 36 + 64 ) + ( 69 + 31 )

= 100 + 100

= 200

12 + 78 + 25 + 75

= (12 + 78 ) + ( 25 + 75 )

= 90 + 100

= 190

a)62 va 7        b)48 va 64           c)200 vs 190

             TK CHO MK NHA !