问题
解答题
运用运算定律或性质进行简算:
|
答案
(1)8.6-3.47-0.53,
=8.6-(3.47+0.53),
=8.6-4,
=4.6;
(2)
×5 7
+8 11
×2 7
,8 11
=(
+5 7
)×2 7
,8 11
=
.8 11
运用运算定律或性质进行简算:
|
(1)8.6-3.47-0.53,
=8.6-(3.47+0.53),
=8.6-4,
=4.6;
(2)
×5 7
+8 11
×2 7
,8 11
=(
+5 7
)×2 7
,8 11
=
.8 11