问题
解答题
能简算的要简算:
|
答案
(1)
×31 4
+0.25×61 4
,3 4
=
×(31 4
+61 4
),3 4
=
×10,1 4
=
;5 2
(2)95.6×27-17×95
,3 5
=95.6×(27-17),
=95.6×10,
=956;
(3)1.21×42-(4.46+
),7 50
=1.21×42-4.6,
=47.04-4.6,
=42.44;
(4)1+45%÷0.9-
,7 8
=1+0.5-0.875,
=1.5-0.875,
=0.625;
(5)(1-
×3 4
)÷(2 5
+1 4
),3 8
=(1-
)÷3 10
,5 8
=
×7 10
,8 5
=
.28 25