\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)

= \(\frac{\left(372+315\right).\left(3+7\right)}{2.\left(169+518\right)}\)

= \(\frac{678.10}{2.687}\)

= 5

~ Hok tốt ~

\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)

= \(\frac{\left(372+315\right).\left(3+7\right)}{2.\left(169+518\right)}\)

= \(\frac{687.10}{2.687}\)

= 5

gà🐓

\(B=\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}=\frac{315.3+372.3+372.7+315.7}{26.13+74.14}=\frac{315.\left(7+3\right)+372.\left(7+3\right)}{26.13+74.14}=\frac{3150+3720}{26.13+74.14}\)

đến đấy bó tay

( 315+372 ) . 3 + ( 372 + 315 )

= (315+315) + (372+372) . 3

= 630 + 744 . 3

= 1374 . 3

= 4122

\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.48}\)

\(=\frac{\left(315+372\right).\left(3+7\right)}{\left(26.13\right)+\left(74.48\right)}\)

\(=\frac{687.10}{39+3552}\)

\(=\frac{6870}{3890}=\frac{687}{389}\)

=5 tich ik mk giai ro rang ra cho 

\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}=\frac{\left(315+372\right).10}{2.\left(13.13+74.7\right)}=\frac{687.10}{2.687}=5\)

\(\left(2061+4809\right):1374\)

\(=6870:1374\)

\(=5\)

[(315+372).3+(372+315).7]: (26.13+74.14)[(315+372).3+(372+315).7]: (26.13+74.14)

=[(7+3)(315+372)]:(2.13.13+2.7.74)=[(7+3)(315+372)]:(2.13.13+2.7.74)

= (10.687):[2(13.13+7.74)]= (10.687):[2(13.13+7.74)]

=(10.687):(2.687)=(10.687):(2.687)

=6870:1374=6870:1374

=5

\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)

\(=\frac{\left(315+372\right)\left(3+7\right)}{26.13+74.13+74}\)

\(=\frac{687.10}{13\left(26+74\right)+74}\)

\(=\frac{6870}{13.100+74}=\frac{6870}{1300+74}\)

\(=\frac{6870}{1374}\)

a) 615 + 37 = 652

b)  [ (315+372).3+1(372+315).7].(26.13+74.14)

=  687 .3 + 1 . 687  . 7 .  (1002 + 1036)

= 687 . ( 3 + 7 ) . 1038

= 687 * 10 . 1038 

= 6870 .. 1038 

= 7131060

li-ke nha