问题
解答题
简算下面个题
|
答案
(1)32.48-12.5-7.5
=32.48-(12.5+7.5),
=32.48-20,
=12.48;
(2)64×15 63
=(63+1)×
,15 63
=63×
+15 63
,15 63
=15+
,15 63
=15
.15 63
(3)2998×9
=×9,
=3000×9-2×9,
=27000-18,
=26982;
(4)
×5 11
+3 4
÷6 11 4 3
=
×5 11
+3 4
×6 11
,3 4
=(
+5 11
)×6 11
,3 4
=1×
,3 4
=
.3 4