题目内容
能简算要简算
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分析:(1)(2)(3)(5)运用乘法分配律解答,
(4)按照从左到右顺序解答,
(6)运用加法交换律和结合律解答.
(4)按照从左到右顺序解答,
(6)运用加法交换律和结合律解答.
解答:解:(1)
×95+
+
=
×(95+1)+
=
×96+
=36+
=36
;
(2)
×
+
×
=(
+
)×
=1×
=
;
(3)(
+
+
)×60
=
×60+
×60+
×60
=32+35+22
=89;
(4)
÷
×
=
×
=
;
(5)
×
+
÷11
=(
+
)×
=1×
=
;
(6)
+6.7+
+4.3
=(
+
)+(6.7+4.3)
=1+11
=12.
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
=
| 3 |
| 8 |
| 3 |
| 8 |
=
| 3 |
| 8 |
| 3 |
| 8 |
=36+
| 3 |
| 8 |
=36
| 3 |
| 8 |
(2)
| 4 |
| 9 |
| 2 |
| 5 |
| 5 |
| 9 |
| 2 |
| 5 |
=(
| 4 |
| 9 |
| 5 |
| 9 |
| 2 |
| 5 |
=1×
| 2 |
| 5 |
=
| 2 |
| 5 |
(3)(
| 8 |
| 15 |
| 7 |
| 12 |
| 11 |
| 30 |
=
| 8 |
| 15 |
| 7 |
| 12 |
| 11 |
| 30 |
=32+35+22
=89;
(4)
| 7 |
| 6 |
| 21 |
| 20 |
| 3 |
| 4 |
=
| 10 |
| 9 |
| 3 |
| 4 |
=
| 5 |
| 6 |
(5)
| 10 |
| 11 |
| 1 |
| 5 |
| 1 |
| 5 |
=(
| 10 |
| 11 |
| 1 |
| 11 |
| 1 |
| 5 |
=1×
| 1 |
| 5 |
=
| 1 |
| 5 |
(6)
| 7 |
| 13 |
| 6 |
| 13 |
=(
| 7 |
| 13 |
| 6 |
| 13 |
=1+11
=12.
点评:(1)依据四则运算计算方法正确进行计算,(2)正确运用简便方法解决问题,是本题考查知识点.
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