问题
解答题
用简便方法计算.
|
答案
(1)8.7×(6.3+3.7),
=8.7×(6.3+3.7),
=8.7×10,
=87;
(2)(
-1 3
+1 6
)×12.1 4
=
×12-1 3
×12+1 6
×12,1 4
=4-2+3,
=5.
用简便方法计算.
|
(1)8.7×(6.3+3.7),
=8.7×(6.3+3.7),
=8.7×10,
=87;
(2)(
-1 3
+1 6
)×12.1 4
=
×12-1 3
×12+1 6
×12,1 4
=4-2+3,
=5.