题目内容
| 直接写出得数: 45%-
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分析:45%-
,把分数化为小数计算;
÷
+5%,按运算顺序计算,先算除法,再算加法;
×25%,把25%化为分数计算;
+15%,把分数化为小数;
÷
,化为乘法,注意约分;
×
,注意约分;
÷
,除以一个数等于乘这个数的倒数.
| 3 |
| 10 |
| 7 |
| 9 |
| 9 |
| 7 |
| 6 |
| 5 |
| 5 |
| 8 |
| 5 |
| 6 |
| 5 |
| 12 |
| 19 |
| 30 |
| 15 |
| 38 |
| 9 |
| 10 |
| 3 |
| 5 |
解答:解:45%-
=0.15;
÷
+5%=
;
×25%=
;
+15%=0.775;
×
=6;
÷
=2;
×
=
;
÷
=1
.
故答案为:0.15,
,
,0.775,6,2,
,1
.
| 3 |
| 10 |
| 7 |
| 9 |
| 9 |
| 7 |
| 1061 |
| 1620 |
| 6 |
| 5 |
| 3 |
| 10 |
| 5 |
| 8 |
| 10 |
| 7 |
| 21 |
| 5 |
| 5 |
| 6 |
| 5 |
| 12 |
| 19 |
| 30 |
| 15 |
| 38 |
| 1 |
| 4 |
| 9 |
| 10 |
| 3 |
| 5 |
| 1 |
| 2 |
故答案为:0.15,
| 1061 |
| 1620 |
| 3 |
| 10 |
| 1 |
| 4 |
| 1 |
| 2 |
点评:此题考查学生对分数、百分数的运算能力.在运算中,注意数的转化,转化为哪种形式的数计算简单就化为哪种数.
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