Tính nhanh giá trị biểu thức A = 1135/23-(167/32+456/23) B = 0,7×8/3x20x0,375×5/28 10/09/2021 Bởi Skylar Tính nhanh giá trị biểu thức A = 1135/23-(167/32+456/23) B = 0,7×8/3x20x0,375×5/28
A=$\frac{1135}{23}$-($\frac{167}{32}$+$\frac{456}{23}$) =($\frac{1135}{23}$-$\frac{456}{23}$)-$\frac{167}{32}$ =$\frac{679}{23}$-$\frac{167}{32}$ =$\frac{17887}{736}$ B=0,7×8/3×20×0,375×5/28 =0,7×5/28×8/3×0,375×20 =1/8×1×20 =0,125×20 =2,5 Bình luận
$A$=$\frac{1135}{23}$ – $($ $\frac{167}{32}$ + $\frac{456}{23}$ $)$ $A$=$\frac{1135}{23}$ – $\frac{167}{32}$ – $\frac{456}{23}$ $A$=$($$\frac{1135}{23}$ – $\frac{456}{23}$ $)$ – $\frac{167}{32}$ $A$=$\frac{679}{23}$ – $\frac{167}{32}$ $A$=$\frac{17887}{736}$ $B$=$0,7$ x $\frac{8}{3}$ x $20$ x $0,375$ x $\frac{5}{28}$ $B$=$($$0,7$ x $\frac{8}{3}$ x $0,375$ x $\frac{5}{28}$$)$ x $20$ $B$=$\frac{1}{8}$ x $20$ $B$=$\frac{5}{2}$ Bình luận
A=$\frac{1135}{23}$-($\frac{167}{32}$+$\frac{456}{23}$)
=($\frac{1135}{23}$-$\frac{456}{23}$)-$\frac{167}{32}$
=$\frac{679}{23}$-$\frac{167}{32}$
=$\frac{17887}{736}$
B=0,7×8/3×20×0,375×5/28
=0,7×5/28×8/3×0,375×20
=1/8×1×20
=0,125×20
=2,5
$A$=$\frac{1135}{23}$ – $($ $\frac{167}{32}$ + $\frac{456}{23}$ $)$
$A$=$\frac{1135}{23}$ – $\frac{167}{32}$ – $\frac{456}{23}$
$A$=$($$\frac{1135}{23}$ – $\frac{456}{23}$ $)$ – $\frac{167}{32}$
$A$=$\frac{679}{23}$ – $\frac{167}{32}$
$A$=$\frac{17887}{736}$
$B$=$0,7$ x $\frac{8}{3}$ x $20$ x $0,375$ x $\frac{5}{28}$
$B$=$($$0,7$ x $\frac{8}{3}$ x $0,375$ x $\frac{5}{28}$$)$ x $20$
$B$=$\frac{1}{8}$ x $20$
$B$=$\frac{5}{2}$