a,7429-(3125+4297)

=7407-93103+4297)

=7407-7400

7

b,9/8-(17/7-3/7)+7/8

=(9/8 +7/8)-(17/7-3/7)

=2-2

=0

c,tự làm nhé..

-2/37 nha bn

19/37+(2-19/17)

=19/37+2-19/17

=(19/37-19/17)+2

=0+2

=2

\(\frac{19}{37}+\left(2-\frac{13}{37}\right)\)

\(=\frac{19}{37}+2-\frac{19}{37}\)

\(=\left(\frac{19}{37}-\frac{19}{37}\right)+2\)

\(=2\)

1-19/37=18/37

19/37+18/37=37/37=1

\( 19/37+(1-19/37) =19/37+1-19/37 =1\)
 

(18/1+12/15)+7/15=2+7/15=37/15

19/37+1/37-19/37=1/37

26/7\(\times\)(11/3-8/3)=26/7\(\times\)1=26/7

1x1x1x1/3x3x2=1/18

cho mình xin 2 k

à quên 2 k

4750/1000 + 370/1000 + 5280/1000 + 2500/1000 + 37/12 = 129/10 + 37/12 = 959/60 

1933/120 nha bạn

19/37+1-19/37

=(19/37-19/37)+1

=0+1

=1

9/8-(17/7-3/7)+7/8

=(9/8+7/8)-(17/7-3/7)

=2-2

=0

1/2+3/4+1/2

=(1/2+1/2)+3/4

=1+3/4

=7/4

19/37 + 1 - 19/37 = (19/37 - 19/37) + 1 = 1

9/8 - (17/7 - 3/7) + 7/8 = (9/8 + 7/8) - (17/7 - 3/7) = 16/8 - 14/7 = 2 - 2 = 0

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

a, 19/37+1-19/37

= (19/37-19/37)+1

=1

b, 9/8- (17/7-3/7)+7/8

= (9/8+7/8) - (17/7-3/7)

=16/8 - 14/7

= 2 - 2

=0

c, 1/2+3/4+1/2

= (1/2+1/2)+3/4

=1+3/4

=7/4

\(\left(\frac{2}{9}+\frac{7}{9}\right)+\left(\frac{1}{5}+\frac{4}{5}\right)=1+1=2\)\(2\)

\(\frac{19}{37}+1-\frac{19}{37}=\left(\frac{19}{37}-\frac{19}{37}\right)+1=1\)

=2 nha bn mk bấm nhầm

mấy phép tính đấy hả bạn

File: undefined ←mik lười ghi ra đây quá. bạn thông cảm nhé.😅😅😅 KẾT BẠN VỚI MIK ĐI 

 = 19/37 - 19/37 + 1

= 0/37 + 1

= 0/37 + 37/37

=1

1 + 19/37 - 19/37

1 + 0 = 1