\(\dfrac{12}{17}>\dfrac{1}{2};\dfrac{5}{36}< \dfrac{1}{2}\\ \Rightarrow\dfrac{12}{17}>\dfrac{5}{36}\)

\(\dfrac{12}{17}\) \(>\) \(\dfrac{5}{36}\)

18x42 +36x79=18x2x21 +36x79=36x21+36x79

=36x(21+79)=39x100=3600

18.42 + 36.79

= 18.42 + 18.2.79

= 18.42 + 18.158

= 18.( 42 + 158 )

= 18.200

= 3600

\(x=\left(145,8:36\right)-0,293=4,05-0,293=3,757\)

 3,52 : 0,57 x 8,4 – 30,68 + 2398    

=\(\dfrac{4928}{95}-30,68+2398=\dfrac{39213}{475}+2398=2480,553684\)

36 x 22 + 72 x 39

= 36 x 22 + 36 x 2 x 39

= 36 x 22 + 36 x 78

= 36 x (22+78)

= 36 x 100

= 3 600

`#3107.101107`

\(\dfrac{24\times101-24}{36\times22+72\times89}\\ =\dfrac{24\times\left(101-1\right)}{36\times22+36\times89\times2}\\ =\dfrac{24\times\left(101-1\right)}{36\times\left(22+178\right)}\\ =\dfrac{24\times100}{36\times200}\\ =\dfrac{2}{3\times2}\\ =\dfrac{2}{6}\\ =\dfrac{1}{3}\)

cục cứt

[(-24,2) + 4,525] + [11,2 + (- 3,525 ) ]

= (-24,2) + 4,525 + 11,2 + (-3,525)

= [(-24,2) + 11,2] + [4,525 + (-3,525)]

= -13 + 1

= -12

\(=\left[\left(-24,2\right)+11,2\right]+\left[4,525+\left(-3,525\right)\right]\)

\(=\left(-13\right)+1\)

\(=\left(-12\right)\)

Bạn tham khảo:

[(-24,3) + 4,525] + [11,2 + (-3,525)]

= (-24,2) + 4,525 + 11,2 + (-3,525) 

= [(-24,2) + 11,2] + [4,525 + (-3,525)]

= 13,2 + 1

= 14,2

36 Pho is the most popular food in Vietnam

37 Lan is the same age as her mother

38 My scool was built by the workers in 1960

39 How many apples are there in the fridge?

40 My best friend loves going on a picnic at the weekend.

cứu vs mn ới

giúppppppppppppppppppppppppppppppppp

=-318+133+217+318=350

\(\left(-318\right)+133+217+318\)

\(=\left(-318+318\right)+\left(133+217\right)\)

\(=0+350=350\)

\(\left(-318\right)+133+217+318=\left(-318+318\right)+\left(133+217\right)=350.\)

42.57+43.42-600 = 42 . ( 57 + 43 ) - 600

                             = ( 42 . 100 ) - 600

                             = 4200 - 600

                             = 3600

\(42\cdot57+43\cdot42-600\\=42\cdot(57+43)-600\\=42\cdot100-600\\=4200-600\\=3600\)

#\(Toru\)

=42.(57+43)-600

=42.100-600

=4200-600

=3600

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