(1)10.92÷5.46-1.2×50%
=2-0.6
=1.4
答:差是1.4.
(2)(40+20)÷
4 5
=60÷
4 5
=75
答:乙数是75.
(3)[(
+1÷5 12
)-5 12
×1 8
]÷2 3
1 20
=[(
+5 12
)-12 5
×1 8
]÷2 3
1 20
=[
-169 60
]÷1 12
1 20
=
÷41 15
1 20
=
164 3
答:结果是
.164 3