题目内容
选做题(从下面两题中任选一题,如果做了两题的,只按第(1)题评分)(Ⅰ)计算:
1 | ||
|
|
(Ⅱ)用计算器计算:
1 | ||
|
0.3 |
分析:(1)此题需根据二次根式的乘法法则进行计算,再把所得结果进行化简即可得出答案.
(2)此题须先把
转化成
,再与
进行相乘,即可求出答案.
(2)此题须先把
0.3 |
|
1 | ||
|
解答:解:(Ⅰ)
×
=
=
=0.1;
(Ⅱ)
×
=
×
=
≈0.316,
故答案为:0.1,0.316.
1 | ||
|
|
|
1 |
10 |
(Ⅱ)
1 | ||
|
0.3 |
1 | ||
|
|
|
故答案为:0.1,0.316.
点评:此题考查了二次根式的乘除法,此题较简单,在解题时要注意最后结果要化简.
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