2.觀察下面備題的計算過程和結果,判斷是否正確,對的畫“√”錯的畫“×”,并改正過來
(1)
14.3-($\frac{3}{5}$+2.4÷2$\frac{2}{3}$)
=14.3-($\frac{3}{5}$+9)
=14.3-9.6
=4.7
(2)
8×$\frac{3}{5}$+8×$\frac{2}{5}$+8
=8×($\frac{3}{5}$+$\frac{2}{5}$+8)
=72
(3)
12.75-[6$\frac{1}{6}$-(4.5+1$\frac{2}{3}$)]
=12.75-[6$\frac{1}{6}$-6$\frac{1}{6}$]
=12.75-0
=12.75.