问题
解答题
|
答案
(1)0.25×1.25×4×8,
=(0.25×4)×(1.25×8),
=1×10,
=10;
(2)2.125×
+1.875÷4,1 4
=(2.125+1.875)×
,1 4
=4×
,1 4
=1;
(3)(2.5-0.125)×0.8+6.24,
=2.5×0.8-0.125×0.8+6.24,
=2-0.1+6.24,
=8.14,
(4)2÷
-2 3
÷2,2 3
=2×
-3 2
×2 3
,1 2
=3-
,1 3
=2
;2 3
(5)2.25×4.8+77.5×0.48,
=(22.5+77.5)×0.48,
=100×0.48,
=48;
(6)36×(
+2 9
),7 12
=36×
+36×2 9
,7 12
=8+21,
=29.