|
(1)3-
×5 18
-27 40
,13 16
=3-
-3 16
,13 16
=3-(
+3 16
),13 16
=3-1,
=2;
(2)
÷7 9
+11 5
×2 9
,5 11
=
×7 9
+5 11
×2 9
,5 11
=
×(5 11
+7 9
),2 9
=
;5 11
(3)65×101-65,
=65×(101-1),
=65×100,
=6500;
(4)70.2÷[(5.3-1.4)×0.2],
=70.2÷(3.9×0.2),
=70.2÷0.78,
=90;
(5)45×
,5 44
=44×
+5 44
,5 44
=5
;5 44
(6)
×4÷1 4
×4,1 4
=1×4×4,
=16.