题目内容
计算下面各题:(能简便计算的要简便计算)
| (1)88×( | (2) | (3) |
| (4) | (5) | (6)4- |
解:(1)88×(
+
),
=88×
+88×
,
=33+2,
=35;
(2)
×
×
,
=
×
,
=
;
(3)
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(4)
×(
-
),
=
×
,
=
;
(5)
×14+
=
×(14+1),
=
×15,
=14;
(6)4-
×
,
=4-
,
=2
.
分析:(1)(3)(5)运用乘法分配律简算;
(2)从左到右的顺序计算;
(4)先算小括号里面的减法,再算括号外的乘法;
(6)先算乘法,再算减法.
点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
=88×
=33+2,
=35;
(2)
=
=
(3)
=(
=1×
=
(4)
=
=
(5)
=
=
=14;
(6)4-
=4-
=2
分析:(1)(3)(5)运用乘法分配律简算;
(2)从左到右的顺序计算;
(4)先算小括号里面的减法,再算括号外的乘法;
(6)先算乘法,再算减法.
点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
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