题目内容
脱式计算.(能简算的要简算)
÷6×
;
5-2÷
×4;
×
+
×
;
66×(
+
+
).
| 3 |
| 5 |
| 1 |
| 10 |
5-2÷
| 16 |
| 3 |
| 5 |
| 12 |
| 1 |
| 5 |
| 4 |
| 5 |
| 5 |
| 12 |
66×(
| 8 |
| 11 |
| 5 |
| 33 |
| 7 |
| 22 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)按照从左向右的顺序进行计算;
(2)先算除法,再算乘法,最后算减法;
(3)根据乘法分配律进行简算;
(4)根据乘法分配律进行简算.
(2)先算除法,再算乘法,最后算减法;
(3)根据乘法分配律进行简算;
(4)根据乘法分配律进行简算.
解答:
解:(1)
÷6×
=
×
=
;
(2)5-2÷
×4
=5-
×4
=5-
=3
;
(3)
×
+
×
=
×(
+
)
=
×1
=
;
(4)66×(
+
+
)
=66×
+66×
+66×
=48+10+21
=58+21
=79.
| 3 |
| 5 |
| 1 |
| 10 |
=
| 1 |
| 10 |
| 1 |
| 10 |
=
| 1 |
| 100 |
(2)5-2÷
| 16 |
| 3 |
=5-
| 3 |
| 8 |
=5-
| 3 |
| 2 |
=3
| 1 |
| 2 |
(3)
| 5 |
| 12 |
| 1 |
| 5 |
| 4 |
| 5 |
| 5 |
| 12 |
=
| 5 |
| 12 |
| 1 |
| 5 |
| 4 |
| 5 |
=
| 5 |
| 12 |
=
| 5 |
| 12 |
(4)66×(
| 8 |
| 11 |
| 5 |
| 33 |
| 7 |
| 22 |
=66×
| 8 |
| 11 |
| 5 |
| 33 |
| 7 |
| 22 |
=48+10+21
=58+21
=79.
点评:考查了运算定律与简便运算,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定律简便计算.
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