8) ((456.11 + 912).37) : 13 . 74
= [(456.11 + 456 . 2).37] : 13 . 74
= [456.(11 + 2).37] : 13 . 74
= 456 . 13 . 37 : 13 . 74
= 456 . 37 : 74
= 456 : ( 74 : 37 )
= 456 : 2
= 228
9) Ta có:
864 . 48 - 432 . 96
= 432 . 2 . 48 - 432 . 96
= 432 . 96 - 432 . 96
= 432 . ( 96 - 96 )
= 432 . 0
= 0
\(\Rightarrow\left(864.48-432.96\right):864.48.432\)
\(=0:864.48.432\)
\(=0\)
\(8,\left[\left(456.11+912\right).37\right]:13.74\)
\(=\left[\left(5016+912\right).37\right]:13.74\)
\(=\left(5928.37\right):13.74\)
\(=219336:13.74\)
\(=16872.74\)
\(=1248528\)
\(9,\left(864.48-432.96\right):864.48.432\)
\(=\left(41472-41472\right):864.48.432\)
\(=0:864.48.432\)
\(=0\)
8)[(456.11+912).37]:13.74 9)(864.48-432.96):864.48.432
=[5928.37]:13.74 =0:864.48.432
=219336:13.74 =0
=16872.74
=1248528
HỌC TỐT NHÉ