问题
解答题
|
答案
(1)361-99,
=361-100+1,
=261+1,
=262;
(2)0.7+3.8+4.2+9.3,
=(0.7+9.3)+(3.8+4.2),
=10+8,
=18;
(3)
×3 5
+1 4
×3 5
,3 4
=
×(3 5
+1 4
),3 4
=
×1,3 5
=
.3 5
|
(1)361-99,
=361-100+1,
=261+1,
=262;
(2)0.7+3.8+4.2+9.3,
=(0.7+9.3)+(3.8+4.2),
=10+8,
=18;
(3)
×3 5
+1 4
×3 5
,3 4
=
×(3 5
+1 4
),3 4
=
×1,3 5
=
.3 5