(1)6696÷62-6.5×10
=108-65
=43;
(2)3-2.81+4-3.19
=3+4-3.19-2.81
=(3+4)-(3.19+2.81)
=7-6
=1;
(3)[1-(
+1 8
)]÷5 16
1 8
=[1-
]÷7 16
1 8
=
÷9 16
1 8
=
;9 2
(4)
+1 2
×8 9
3 4
=
+1 2
2 3
=
;7 6
(5)0.6×47+52×
+60%3 5
=0.6×(47+52+1)
=0.6×100
=60.