题目内容
| 36× | ||
| ( | 13 |
解:(1)36×
,
=(35+1)×
,
=35×
+1×
,
=17+
,
=17
;
(2)
×
+
,
=
×
+
×
,
=
×
+
×
,
=
×(
+
),
=
×1,
=
;
(3)
×
+
,
=
×
+
×
+
,
=2+
+
,
=2+(
+
),
=2+2
,
=4
;
(4)(
+
)
,
=(
+
)×
,
=
×
+
×
,
=
+1,
=4
;
(5)
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(6)13
-(4
+3
),
=13
-4
-3
,
=13
-3
-4
,
=10-4
,
=5
.
分析:(1)根据乘法分配律进行计算;
(2)根据乘法分配律进行计算;
(3)根据乘法分配律进行计算;
(4)根据乘法分配律进行计算;
(5)根据乘法分配律进行计算;
(6)根据连减的性质进行计算.
点评:四则运算,先弄清运算顺序,然后再进一步计算即可,能简算的要简算.
=(35+1)×
=35×
=17+
=17
(2)
=
=
=
=
=
(3)
=
=2+
=2+(
=2+2
=4
(4)(
=(
=
=
=4
(5)
=
=(
=1×
=
(6)13
=13
=13
=10-4
=5
分析:(1)根据乘法分配律进行计算;
(2)根据乘法分配律进行计算;
(3)根据乘法分配律进行计算;
(4)根据乘法分配律进行计算;
(5)根据乘法分配律进行计算;
(6)根据连减的性质进行计算.
点评:四则运算,先弄清运算顺序,然后再进一步计算即可,能简算的要简算.
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