\(B=\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}=\frac{315.3+372.3+372.7+315.7}{26.13+74.14}=\frac{315.\left(7+3\right)+372.\left(7+3\right)}{26.13+74.14}=\frac{3150+3720}{26.13+74.14}\)
đến đấy bó tay
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
\(\frac{\left(315+372\right).3+\left(372+315\right)}{26.13+74.14}\)
Tính: \(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.48}\)=?
Bài 3 : tính nhanh
a) 615+185:5
b) [ (315+372).3+1(372+315).7].(26.13+74.14)
Tính:
[(315+372).3+(372+315).7]:(26.13+74.14)
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
