问题
解答题
计算 (1)8.01+99×8.01 (2)125×(8+0.8+0.08+0.008) (3)
(4)(0.4+
(5)989898×999999÷10101÷111111. |
答案
(1)8.01+99×8.01,
=(1+99)×8.01,
=100×8.01,
=801;
(2)125×(8+0.8+0.08+0.008),
=125×8+125×0.8+125×0.08+125×0.008,
=1000+100+10+1,
=1111;
(3)
+1 2
+1 4
+1 8
+1 16
,1 32
=1-
+1 2
-1 2
+1 4
-1 4
+1 8
-1 8
+1 16
-1 16
,1 32
=1-
,1 32
=
;31 32
(4)(0.4+
)÷(2 3
-0.75)×0.5,5 6
=(
+2 5
)÷(2 3
-5 6
)×0.5,3 4
=
÷16 15
×1 12
,1 2
=
×12×16 15
,1 2
=
;32 5
(5)989898×999999÷10101÷111111,
=(98×10101)×(9×111111)÷10101÷111111,
=(98×10101÷10101)×(9×111111÷111111),
=98×9,
=(100-2)×9,
=900-18,
=882.