问题
解答题
|
答案
(1)41×101,
=41×100+41×1,
=4100+41,
=4141;
(2)7.8+
+2.2+3 10
,7 10
=(7.8+2.2)+(
+3 10
),7 10
=10+1,
=11;
(3)72×(
+3 8
),4 9
=72×
+72×3 8
,4 9
=27+32,
=59;
(4)2.5×1.25×32,
=(2.5×4)×(1.25×8),
=10×10,
=100;
(5)[1-(
+1 5
)]÷3 10
,1 4
=[1-
]÷1 2
,1 4
=
÷1 2
,1 4
=2;
(6)(
-2 3
)÷(7 12
+2 7
),1 8
=
÷1 12
,23 56
=
.14 69