题目内容
脱式计算
①854-3232÷32
②
-
+
③1.5×(7.1-6.9)+6.73
④
÷[
×(
+
)].
①854-3232÷32
②
| 8 |
| 9 |
| 5 |
| 6 |
| 1 |
| 3 |
③1.5×(7.1-6.9)+6.73
④
| 5 |
| 8 |
| 12 |
| 17 |
| 1 |
| 2 |
| 9 |
| 16 |
分析:①先算除法,再算减法;
②按照从左到右的顺序计算;
③先算小括号里面的减法,再算括号外的乘法,最后算加法;
④先算小括号里面的加法,再算中括号里面的乘法,最后算括号外的除法.
②按照从左到右的顺序计算;
③先算小括号里面的减法,再算括号外的乘法,最后算加法;
④先算小括号里面的加法,再算中括号里面的乘法,最后算括号外的除法.
解答:解:①854-3232÷32,
=854-101,
=753;
②
-
+
,
=
+
,
=
;
③1.5×(7.1-6.9)+6.73,
=1.5×0.2+6.73,
=0.3+6.73,
=7.03;
④
÷[
×(
+
)],
=
÷[
×
],
=
÷
,
=
.
=854-101,
=753;
②
| 8 |
| 9 |
| 5 |
| 6 |
| 1 |
| 3 |
=
| 1 |
| 18 |
| 1 |
| 3 |
=
| 7 |
| 18 |
③1.5×(7.1-6.9)+6.73,
=1.5×0.2+6.73,
=0.3+6.73,
=7.03;
④
| 5 |
| 8 |
| 12 |
| 17 |
| 1 |
| 2 |
| 9 |
| 16 |
=
| 5 |
| 8 |
| 12 |
| 17 |
| 17 |
| 16 |
=
| 5 |
| 8 |
| 6 |
| 8 |
=
| 5 |
| 6 |
点评:此题主要考查分数、整数、小数的四则混合运算,注意运算的顺序.
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