1,325 : 0,5 + 36,75 + 1,325 : 0,125

= 1,325 x 2 + 1,235 x 8 + 36,75

= 1,325 x ( 2 +8) + 36,75

= 1,325 x 10 + 36,75

= 13,25 + 36,75

= 50

Chọn C

c

x : 0,1 = 12

x x 10 = 12

x = 12 : 10

x = 1,2

--------------------------------------------

4 : 0,25 + 320 x 0,5 + 3: 0,125

= 4 x 4 + 320 : 2 + 3 x 8

= 16 + 160 + 24

= 160 + (16 + 24)

= 160 + 40

= 200

\(\frac{2017}{2018}\)x\(\frac{7}{8}\)+\(\frac{2017}{2018}\)x\(\frac{3}{8}\)-\(\frac{2017}{2018}\)x\(\frac{1}{4}\)

= \(\frac{2017}{2018}\)x  (\(\frac{7}{8}\)+\(\frac{3}{8}\)-\(\frac{1}{4}\))

= \(\frac{2017}{2018}\)x  ( \(\frac{10}{8}\)- \(\frac{1}{4}\))

= \(\frac{2017}{2018}\)x ( \(\frac{10}{8}\)- \(\frac{2}{8}\))

= \(\frac{2017}{2018}\)x  1

= \(\frac{2017}{2018}\)

Chúc em học tốt nhé :>

=2017/2018*(7/8+3/8)-2017*1/4

=2017/2018*5/4+2017*-1/4

=2017/2018*(5/4-1/4)

=2017/2018*1

=2017/2018

89x(19-16+3)=89x6=534

C giai giúp bé  rồi nhé

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710 x 13,4 - 710 x 1,4 - 710 : 0,5

= 710 x 13,4 - 710 x 1,4 - 710 x 2

= 710 x ( 13,4 - 1,4 - 2 )

= 710 x 10

= 7100

710 x 13,4 - 710 x 1,4 - 710 : 0,5

= 710 x 13,4 - 710 x 1,4 - 710 x 2

= 710 x ( 13,4 - 1,4 - 2)

= 710 x ( 12 -2)

= 710 x 10

= 7 100 

=0,56+0,44+0,81+0,19

=1+1

=2

\(34,4\times12-34,4:0,5\)

\(=34,4\times12-34,4\times2\)

\(=34,4\times\left(12-2\right)\)

\(=34,4\times10\)

\(=344\)

34,4 \(\times\) 12 - 34,4: 0,5

= 34,4 \(\times\) 12 - 34,4 \(\times\) 2

= 34,4 \(\times\) ( 12 - 2)

= 34,4 \(\times\) 10

= 344