题目内容
下面各题,怎样简便就怎样计算.
×
÷
×
+
÷7
11.58-(7
+1.58)
24×(
+
)
| 11 |
| 12 |
| 9 |
| 46 |
| 22 |
| 23 |
| 3 |
| 4 |
| 1 |
| 7 |
| 1 |
| 4 |
11.58-(7
| 5 |
| 11 |
24×(
| 1 |
| 4 |
| 5 |
| 6 |
考点:整数、分数、小数、百分数四则混合运算,运算定律与简便运算
专题:运算顺序及法则,运算定律及简算
分析:①
×
÷
,把除数转化为乘它的倒数,再根据分数乘法的计算法则进行计算;
②
×
+
÷7,把除数转化为乘它的倒数,再运用乘法分配律简算;
③11.58-(7
+1.58),根据减法的运算性质简算;
④24×(
+
),运用乘法分配律简算.
| 11 |
| 12 |
| 9 |
| 46 |
| 22 |
| 23 |
②
| 3 |
| 4 |
| 1 |
| 7 |
| 1 |
| 4 |
③11.58-(7
| 5 |
| 11 |
④24×(
| 1 |
| 4 |
| 5 |
| 6 |
解答:
解:①
×
÷
=
×
×
=
;
②
×
+
÷7
=(
+
)×
=1×
=
;
③11.58-(7
+1.58)
=11.58-1.58-7
10-7
=2
;
④24×(
+
)
=24×
+24×
=6+20
=26.
| 11 |
| 12 |
| 9 |
| 46 |
| 22 |
| 23 |
=
| 11 |
| 12 |
| 9 |
| 46 |
| 23 |
| 22 |
=
| 3 |
| 16 |
②
| 3 |
| 4 |
| 1 |
| 7 |
| 1 |
| 4 |
=(
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 7 |
=1×
| 1 |
| 7 |
=
| 1 |
| 7 |
③11.58-(7
| 5 |
| 11 |
=11.58-1.58-7
| 5 |
| 11 |
10-7
| 5 |
| 11 |
=2
| 6 |
| 11 |
④24×(
| 1 |
| 4 |
| 5 |
| 6 |
=24×
| 1 |
| 4 |
| 5 |
| 6 |
=6+20
=26.
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以及它们的计算法则,并且能够灵活选择简便方法进行计算.
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