(1)
5.3×9.6+4.7×9.6
=(5.3+4.7)×9.6
=10×9.6
=96
(2)
47.3-8.16-11.84
=47.3-(8.16+11.84)
=47.3-20
=27.3
(3)
6.4+3.38+6.62+3.6
=(6.4+3.6)+(3.38+6.62)
=10+10
=20