\(\frac{\left(315+372\right).3+\left(372+315\right)}{26.13+74.14}\)
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
= \(\frac{\left(372+315\right).\left(3+7\right)}{2.\left(169+518\right)}\)
= \(\frac{678.10}{2.687}\)
= 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
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
B= \(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
Tính nhanh
\(B=\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}=\frac{315.3+372.3+372.7+315.7}{26.13+74.14}=\frac{315.\left(7+3\right)+372.\left(7+3\right)}{26.13+74.14}=\frac{3150+3720}{26.13+74.14}\)
đến đấy bó tay
Tính: \(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.48}\)=?
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.48}\)
\(=\frac{\left(315+372\right).\left(3+7\right)}{\left(26.13\right)+\left(74.48\right)}\)
\(=\frac{687.10}{39+3552}\)
\(=\frac{6870}{3890}=\frac{687}{389}\)
[(315+372).3+(372+315).7]:(26.13+74.14)
\(\left(2061+4809\right):1374\)
\(=6870:1374\)
\(=5\)
[(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
Tính:
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}=\frac{\left(315+372\right).10}{2.\left(13.13+74.7\right)}=\frac{687.10}{2.687}=5\)
Tính thuận tiện nhất
A)\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
B) \(\frac{1978.1979+1980.21+1958}{1980.1979-1978.1979}\)
C)\(\frac{26.108-26.12}{32-28-24-20+16-12+8-4}\)
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Cảm ơn vì đã giải cho mk nè
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
\(=\frac{\left(315+372\right)\left(3+7\right)}{26.13+74.13+74}\)
\(=\frac{687.10}{13\left(26+74\right)+74}\)
\(=\frac{6870}{13.100+74}=\frac{6870}{1300+74}\)
\(=\frac{6870}{1374}\)
( 315 +372) .3 +(312 +315) . 7 / 26.13+74.14