题目内容
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|
1.8×
|
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| 10÷10%= | 6.3×20= | 7-
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分析:除以一个数,就等于乘这个数的倒数;分数乘分数,用分母乘分母,分子乘分子;分数乘整数(小数),先约分再计算;异分母分数相加减,先化成同分母分数,再进行加减即可解答,据此分析即可逐题解答.
解答:解:(1)
÷
=
×
=
;
(2)
×35=25;
(3)1.8×
=0.3;
(4)
+
=
;
(5)10÷10%
=10×
=100;
(6)6.3×20=126;
(7)7-
-
=7-(
+
)
=7-1
=6;
(8)
÷80%
=
×
=1;
(9)
+
÷
=
+1
=1
;
(10)
×
÷
=
÷
=
×
=
.
| 3 |
| 5 |
| 2 |
| 5 |
=
| 3 |
| 5 |
| 5 |
| 2 |
=
| 3 |
| 2 |
(2)
| 5 |
| 7 |
(3)1.8×
| 1 |
| 6 |
(4)
| 2 |
| 3 |
| 1 |
| 4 |
| 11 |
| 12 |
(5)10÷10%
=10×
| 100 |
| 10 |
=100;
(6)6.3×20=126;
(7)7-
| 5 |
| 7 |
| 2 |
| 7 |
=7-(
| 5 |
| 7 |
| 2 |
| 7 |
=7-1
=6;
(8)
| 4 |
| 5 |
=
| 4 |
| 5 |
| 100 |
| 80 |
=1;
(9)
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
=
| 4 |
| 5 |
=1
| 4 |
| 5 |
(10)
| 4 |
| 9 |
| 3 |
| 4 |
| 4 |
| 9 |
=
| 1 |
| 3 |
| 4 |
| 9 |
=
| 1 |
| 3 |
| 9 |
| 4 |
=
| 3 |
| 4 |
点评:此题主要考查分数四则运算的计算法则的灵活应用,要注意能简便计算的要简便计算.
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