\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
\(=\frac{\left(315+372\right)\left(3+7\right)}{26.13+74.13+74}\)
\(=\frac{687.10}{13\left(26+74\right)+74}\)
\(=\frac{6870}{13.100+74}=\frac{6870}{1300+74}\)
\(=\frac{6870}{1374}\)
\(a,\frac{1978.1979+1980.21+1958}{1980.1979-1978.1979}\)
\(b,\frac{26.108-26.12}{32-28+24-20+16-12+8-4}\)\(c,\frac{48.700-24.45.20}{45-40+35-30+25-20+15-10+5}\)
B= \(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
Tính nhanh
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
\(\frac{\left(315+372\right).3+\left(372+315\right)}{26.13+74.14}\)
Tính: \(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
tính nhanh
a) 5 . 3 - 32 : 2
b) 19 . 37 + 63 . 19 - 400
c) 205 - { 102 - [ 48 - ( 16 - 14 ) ] }
d) 5 : 5 - 3 : 3
e) 25 . 3 + 253 . 72 + 253
g) 18 [ ( 3 . 24 + 3 . 4 - 27 . 3 ) - 71 . 1 ] - 80
h) \(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.14}\)
i) \(\frac{2004.2005+2006.20+1985}{2006.2005-2001:2005}\)
Chú ý : dấu gạch ngang thay cho dấu chia nhé
\(\frac{\left(315+372\right).3+\left(372+315\right).7}{26.13+74.48}\)=?
tính \(\frac{1978.1979+1980.21+1958}{1980.1979-1978.1979}\)
