a,=(48,25+51,75)+(17,72+87,28)

=100+100

=200

b,=(0,087+1,913)+(1,123+0,887)

=2+2

=4

` = (48,25 + 51,75) + (12,72 + 87,28)`
`  = 100 + 100`
`  = 200`

________________________________
 ` = ( 0,087 + 1,913) + ( 1,123 + 0,877)`
 ` = 2 + 2=4`

=(48,25+51,75)+(17,72+87,28)=100+105=205

=(0,087+1,913)+(0,877+1,123)=2+2=4

a: =100+100=100

b: =1+2=3

a) 48,25 + 12,72 + 51,75 + 87,28
  = (48,25 + 51,75) + (12,72 + 87,28)
  = 100 + 100
  = 200
b) 0,087 + 1,123 + 0,913 + 0,877
  = ( 0,087 + 0,913) + ( 1,123 + 0,877)
  = 1 + 2
  = 3

a =200

b = 3

0,087+1,123+0,913+0,877

= (0,087+0,913)  + (1,123+0,877)

=           1            +           2

=                         3

3

3

998 x 199,8 + 199,8 + 199,8

= 998 x 199,8 + 199,8 x 1 + 199,8 x 1

= 199,8 x (998 + 1 + 1)

= 199,8 x 1000

= 199800

998 x 199,8 + 199,8 + 199,8 

= 998 x 199,8 + 199,8 x 1 + 199,8 x 1

= 199,8 x (998 + 1 + 1)

= 199,8 x 100

= 19980

@Nguyễn Trần Thành Đạt sao 998 + 1 + 1 = lại = 100 ạ?

\(\dfrac{3}{5}\times\dfrac{2}{7}-\dfrac{3}{5}\times\dfrac{4}{7} +\dfrac{3}{5}\)

\(=\dfrac{3}{5}\times\left(1+\dfrac{2}{7}-\dfrac{4}{7}\right)\)

\(=\dfrac{3}{5}\times\left(\dfrac{7}{7}+\dfrac{2}{7}-\dfrac{4}{7}\right)\)

\(=\dfrac{3}{5}\times\left(\dfrac{7+2-4}{7}\right)\)

\(=\dfrac{3}{5}\times\dfrac{5}{7}\)

\(=\dfrac{3}{7}\)

= 3/5 x 2/7 - 3/5 x 4/7 + 3/5 x 1

= 3/5 x ( 2/7 + 4/7 + 1 )

= 3/5 x 1

= 3/5

nhớ tích nha

\(37x2+325:5-172\)

\(=74+65-172\)

\(=74+26+39-100-39-33\)

\(=100-100+39-39-33\)

\(=-33\)

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

C giai giúp bé  rồi nhé

vâng ạ , em cảm ơn Phạm Thu Trang ạ <3

\(1,325:0,5+36,75+1,325:0,125\)

\(=1,325\times2+1,325\times8+36,75\)

\(=1,325\times\left(2+8\right)+36,75\)

\(=1,325\times10+36,75\)

\(=13,25+36,75\)

\(=50\)

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Đề bài hơi lỗi nha

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