题目内容
计算
3.6×0.76+3.6×0.24
(
-
)÷(
+
)
×
+
×
+
[
-(
-
)]÷
.
3.6×0.76+3.6×0.24
(
| 5 |
| 6 |
| 3 |
| 4 |
| 3 |
| 14 |
| 2 |
| 7 |
| 4 |
| 5 |
| 8 |
| 11 |
| 4 |
| 5 |
| 3 |
| 11 |
| 4 |
| 5 |
[
| 1 |
| 2 |
| 3 |
| 4 |
| 4 |
| 5 |
| 7 |
| 10 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)(3)运用乘法分配律解答,
(2)按照先同时计算括号里面的,再算括号外面的顺序计算解答,
(4)按照先算小括号里面的,再算中括号里面的,最后算括号外面的顺序计算解答.
(2)按照先同时计算括号里面的,再算括号外面的顺序计算解答,
(4)按照先算小括号里面的,再算中括号里面的,最后算括号外面的顺序计算解答.
解答:
解:(1)3.6×0.76+3.6×0.24
=3.6×(0.76+0.24)
=3.6×1
=3.6;
(2)(
-
)÷(
+
)
=
÷
=
;
(3)
×
+
×
+
=
×(
+
+1)
=
×2
=1
;
(4)[
-(
-
)]÷
=[
-
]÷
=
÷
=
.
=3.6×(0.76+0.24)
=3.6×1
=3.6;
(2)(
| 5 |
| 6 |
| 3 |
| 4 |
| 3 |
| 14 |
| 2 |
| 7 |
=
| 1 |
| 12 |
| 1 |
| 2 |
=
| 1 |
| 6 |
(3)
| 4 |
| 5 |
| 8 |
| 11 |
| 4 |
| 5 |
| 3 |
| 11 |
| 4 |
| 5 |
=
| 4 |
| 5 |
| 8 |
| 11 |
| 3 |
| 11 |
=
| 4 |
| 5 |
=1
| 3 |
| 5 |
(4)[
| 1 |
| 2 |
| 3 |
| 4 |
| 4 |
| 5 |
| 7 |
| 10 |
=[
| 1 |
| 2 |
| 1 |
| 20 |
| 7 |
| 10 |
=
| 9 |
| 20 |
| 7 |
| 10 |
=
| 9 |
| 14 |
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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