计算. 3.12÷1.2-1.2×0.6 3000÷24+103×32 55×66÷(11×11) 11/3×12.5×9/10×8= 5/8-(1/2+3/5)×5/11= 123×5.67+8.77×567=

问题描述:

计算.
3.12÷1.2-1.2×0.6       

3000÷24+103×32               

55×66÷(11×11)
11
3
×12.5×
9
10
×8=
5
8
-(
1
2
+
3
5
)×
5
11
=
123×5.67+8.77×567=

(1)3.12÷1.2-1.2×0.6
=2.6-0.72
=1.88;
(2)3000÷24+103×32
=125+3296
=3421;
(3)55×66÷(11×11)
=55×66÷11÷11
=(55÷11)×(66÷11)
=5×6
=30;
(4)

11
3
×12.5×
9
10
×8
=(
11
3
×
9
10
)×(12.5×8)
=
33
10
×100
=330;
(5)
5
8
-(
1
2
+
3
5
)×
5
11

=
5
8
-
11
10
×
5
11

=
5
8
-
1
2

=
1
8

(6)123×5.67+8.77×567
=123×5.67+877×5.67
=(123+877)×5.67
=1000×5.67
=5670.