(1)0.36+0.545+0.45
=0.905+0.45
=1.355 (2)8.3-0.46-1.237
=7.84-1.237
=6.603
(3)23.4-5.85-4.15
=23.4-(5.85+4.15)
=23.4-10
=13.4 (4)39.7+ 20.43+ 0.3+ 9.57
=(39.7+0.3)+(20.43+9.57)
=40+30
=70
(5)14.52-(4.52+7.88)
=14.52-12.4
=2.12
(6)15.28 +28.99+ 20.72
=(15.28+20.72)+28.99
=36+28.99
=64.99