题目内容
计算．
×56+
×56
(
+
)÷
(
-
)÷
6×
+0.5÷2．
| 5 |
| 8 |
| 3 |
| 8 |
(
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
(
| 5 |
| 14 |
| 1 |
| 7 |
| 2 |
| 5 |
6×
| 2 |
| 9 |
分析：
×56+
×56，运用乘法分配律简算；
(
+
)÷
，把除数转化为乘它的倒数，再运用乘法分配律简算；
(
-
)÷
，先算括号里面的减法，再算除法；
6×
+0.5÷2，先算乘法和除法，最后算加法．
| 5 |
| 8 |
| 3 |
| 8 |
(
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
(
| 5 |
| 14 |
| 1 |
| 7 |
| 2 |
| 5 |
6×
| 2 |
| 9 |
解答：解：
×56+
×56
=(
+
)×56
=1×56
=56；
(
+
)÷
×
+
×
=1+
=2
；
(
-
)÷
=
÷
=
×
=
；
6×
+0.5÷2．
=
+
×
=
+
=
．
| 5 |
| 8 |
| 3 |
| 8 |
=(
| 5 |
| 8 |
| 3 |
| 8 |
=1×56
=56；
(
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
| 3 |
| 4 |
| 4 |
| 3 |
| 4 |
| 5 |
| 4 |
| 3 |
=1+
| 16 |
| 15 |
=2
| 1 |
| 15 |
(
| 5 |
| 14 |
| 1 |
| 7 |
| 2 |
| 5 |
=
| 3 |
| 14 |
| 2 |
| 5 |
=
| 3 |
| 14 |
| 5 |
| 2 |
=
| 15 |
| 28 |
6×
| 2 |
| 9 |
=
| 4 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
=
| 4 |
| 3 |
| 1 |
| 4 |
=
| 19 |
| 12 |
点评：此题考查的目的是理解掌握分数、小数四则混合运算的顺序及它们的计算法则，并且能够灵活选择简便方法进行计算．
练习册系列答案
相关题目