2870 đó bạn

Mk yêu cầu tính nhe bạn

\(\frac{37.13-13}{24+37.12}=\frac{13.\left(37-1\right)}{2.12+37.12}=\frac{13.36}{12.\left(2+37\right)}=\frac{13.36}{12.39}=\frac{3}{3}=1\)

\(\frac{37.13-13}{24+37.12}=\frac{13-13}{24+12}=\frac{0}{36}=0\)

 Xét tử số 37x13-13=( 37x12+37 )-13 
Bằng 37x12+24 
Suy ra:37x13-13/24+37x12 = 37x12+24/24+37x12 
Vậy bằng 1

37 x 13 - \(\frac{13}{24}\) + 37 x 12

=  37 x ( 13 + 12) - \(\frac{13}{24}\)

=  37 x 25 - \(\frac{13}{24}\)

=      925 - \(\frac{13}{24}\)

=       \(\frac{22187}{24}\)

\(37\times13-\frac{13}{24}+37\times12\)

\(=37\times13+37\times12-\frac{13}{24}\)

\(=37\times\left(13+12\right)-\frac{13}{24}\)

\(=37\times15-\frac{13}{24}\)

\(=505-\frac{13}{24}\)

\(=\frac{505\times24-13}{24}\)

\(=\frac{12107}{24}\)

1, =35 x 77-35 x 12+35x35-35 x 18 suy ra =35 x(77-12+35-18)=35 x 82=2870.

2, =2014 x (100-1)=201400-2014=199386.

3,=35x12+65x12+65=12x(65+35)+65=1200+65=1265.

4.=\(\frac{13\times\left(37-1\right)}{12\times\left(37+2\right)}\)=\(\frac{13\times36}{12\times39}=\frac{13\times3\times12}{12\times3\times13}=1\)

tck nha bạn

3 x 8/15 x 12 = 3x8/15 x12 = 24/15 x 12 = 288/15

7 x 25-49/7 x 24+21= 175 - 7 x24 + 21 =4053

2 x (-13) x 9 x 10/(-3) x 4 x (-5) x 26= -26 x 9 x 10 / 1560 = -234 x 1/156 = -3/2

em xin lỗi nhưng em mới học lớp 5 thôi

\(\frac{37\times13-13}{24+37\times12}\)

\(=\frac{27\times12+37-13}{24+37\times12}\)

\(=\frac{24+37\times12}{24+37\times12}\)

\(=1\)