题目内容
|
1.6÷
|
(
|
3
|
1÷4
| ||||||||||||||||||
6-3
|
(
|
(0.375÷
|
|
1
|
分析:(1)、(2)、(3)、(4)、(5)、(8)、(10)直接运用分数小数乘除法的计算法则进行计算即可.
(6)运用一个数减去两个数可以运用这个数减去这两个数的和计算.
(7)运用乘法的分配律进行计算即可.
(9)运用乘法的结合律及交换律进行计算即可.
(6)运用一个数减去两个数可以运用这个数减去这两个数的和计算.
(7)运用乘法的分配律进行计算即可.
(9)运用乘法的结合律及交换律进行计算即可.
解答:解:(1)
×
=
;
(2)1.6÷
,
=1.6×
,
=2;
(3)(
-0.75)÷9,
=0÷9,
=0;
(4)3
÷3
=1;
(5)1÷4
,
=1×
,
=
;
(6)6-3
-2
,
=6-(3
+2
),
=0;
(7)(
+
)×36,
=36×
+
×36,
=47;
(8)(0.375÷
-1)×4
,
=(1-1)×4
,
=0;
(9)
×
×14×19
=(
×14)×(
×19),
=2;
(10)1
÷6,
=
×
,
=
.
| 5 |
| 6 |
| 4 |
| 15 |
| 2 |
| 9 |
(2)1.6÷
| 4 |
| 5 |
=1.6×
| 5 |
| 4 |
=2;
(3)(
| 3 |
| 4 |
=0÷9,
=0;
(4)3
| 4 |
| 7 |
| 4 |
| 7 |
(5)1÷4
| 1 |
| 3 |
=1×
| 3 |
| 13 |
=
| 3 |
| 13 |
(6)6-3
| 2 |
| 7 |
| 5 |
| 7 |
=6-(3
| 2 |
| 7 |
| 5 |
| 7 |
=0;
(7)(
| 3 |
| 4 |
| 5 |
| 9 |
=36×
| 3 |
| 4 |
| 5 |
| 9 |
=47;
(8)(0.375÷
| 3 |
| 8 |
| 5 |
| 9 |
=(1-1)×4
| 5 |
| 9 |
=0;
(9)
| 1 |
| 7 |
| 1 |
| 19 |
=(
| 1 |
| 7 |
| 1 |
| 19 |
=2;
(10)1
| 1 |
| 3 |
=
| 4 |
| 3 |
| 1 |
| 6 |
=
| 2 |
| 9 |
点评:考查了运算定律与简便运算及分数小数的四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算律简便计算.
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