Question

Tinh Nhanh 

1,4:3 + 5,8:3     {1,25 x 3,6}:{9 x 5}          2019 x 2 + 2019 :0,125

Answer 1

a) (1,4 + 5,8) ; 3

= 7,2 : 3 = 2,4

b) (1,25 x 4 x 0,9) ; ( 9 x 5)

=(5 x 0,9) ; (9x 5 )

= 4,5 : 45

= 0,1

c) 2019 x 2 + 2019 x 8

= 2019 x ( 2 + 8)

= 2019 x 10

=20190

#chanh

Answer 2

a. 1,4 : 3 + 5,8 : 3

= (1,4 + 5,8) : 3

= 7,2 : 3

= 2,4

b. (1,25 x 3,6) : (9 x 5)

= 4,5 : 45

= 0,1

c. 2019 x 2 + 2019 : 0,125

= 2019 x 2 + 2019 x 8

= 2019 x (2 + 8)

= 2019 x 10 = 20190

Answer 3

\(1,4:3+5,8:3=\left(1,4+5,8\right):3=7,2:3=2,4\)

\(\left(1,25\times3,6\right):\left(9\times5\right)=4,5:45=0,1\)

\(2019\times2+2019:0,125=2019\times2+2019\times8=2019\times10=20190\)

Answer 4

1.4:3+5.8:3=(1.4+5.8):3

=7.2:3

=2.4

Answer 5

\(\text{a) 1,4:3 + 5,8 :3 = (1,4+5,8): 3 = 7,2 : 3 = 2,4 }\)

b) (1,25 x 3,6): (9x5)

= (1,25 :5 ) x ( 3,6: 9)

=       0,25    x     4

=                   1

c) 2019 x 2 + 2019 : 0,125

= 2019 x 2 + 2019 x 8

= 2019 x( 2+ 8)

=2019x 10

Answer 6

{1.25 . 3.6} : {9 . 5}

=4.5 . 45

=202.5

Answer 7

Câu b mk sai òi đừng để ý

Answer 8

lm lại 

{1.25 . 3.6} : {9 . 5}

= 4.5 : 45

=0.1