二、计算下面各题，怎样简便就怎样计算。
$6.48×0.4 + 9.52÷2.5$
$27.63 - 3.54 - 17.63 - 2.46$
$12.6 - 8.84÷1.7÷13$
$(25.2 - 1.4)÷17 + 0.76$
$3.62 + (5.6×10.1 - 0.98)$
$16.31 - (7.63 - 4.69) - 2.37$
$40.5 - 24.5÷3.5 + 0.62$
$9.42×4.5 + 94.2×0.55$
$55×[27.3 - (7.17 + 2.63)]$
$1.44÷[9.6÷(245 - 165)]$

1. $6.48×0.4 + 9.52÷2.5$
解：
$6.48×0.4 + 9.52÷2.5=6.48×0.4 + 9.52×0.4=(6.48 + 9.52)×0.4=16×0.4 = 6.4$
2. $27.63 - 3.54 - 17.63 - 2.46$
解：
$27.63 - 3.54 - 17.63 - 2.46=(27.63 - 17.63)-(3.54 + 2.46)=10 - 6 = 4$
3. $12.6 - 8.84÷1.7÷13$
解：
$12.6 - 8.84÷1.7÷13=12.6-(8.84÷1.7)÷13=12.6 - 5.2÷13=12.6 - 0.4 = 12.2$
4. $(25.2 - 1.4)÷17 + 0.76$
解：
$(25.2 - 1.4)÷17 + 0.76=23.8÷17 + 0.76 = 1.4+0.76 = 2.16$
5. $3.62+(5.6×10.1 - 0.98)$
解：
$3.62+(5.6×10.1 - 0.98)=3.62+(5.6×(10 + 0.1)-0.98)=3.62+(56+0.56 - 0.98)=3.62+(56.56 - 0.98)=3.62 + 55.58 = 59.2$
6. $16.31-(7.63 - 4.69)-2.37$
解：
$16.31-(7.63 - 4.69)-2.37=(16.31 + 4.69)-(7.63 + 2.37)=21 - 10 = 11$
7. $40.5 - 24.5÷3.5 + 0.62$
解：
$40.5 - 24.5÷3.5 + 0.62=40.5 - 7+0.62 = 33.5+0.62 = 34.12$
8. $9.42×4.5 + 94.2×0.55$
解：
$9.42×4.5 + 94.2×0.55=9.42×4.5 + 9.42×5.5=9.42×(4.5 + 5.5)=9.42×10 = 94.2$
9. $55×[27.3-(7.17 + 2.63)]$
解：
$55×[27.3-(7.17 + 2.63)]=55×(27.3 - 9.8)=55×17.5 = 962.5$
10. $1.44÷[9.6÷(245 - 165)]$
解：
$1.44÷[9.6÷(245 - 165)]=1.44÷(9.6÷80)=1.44÷0.12 = 12$