
七上第三次段考複習卷19
Authored by 黃俊賓 關山國中
Mathematics
7th Grade
Used 4+ times

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35 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
的值為下列何者?
−2
0
1
2
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
化簡 之後,可得下列哪一個結果?
36
28
−36
−28
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列四個敘述中,哪一個是正確的?
2x 表示 2 + x
表示 x + x
2x2 表示
2x + 5 表示 x+x + 5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
某商品定價為 x 元時,可獲利成本的 20%;若此商品訂一新價格再打九折後,可獲利成本的 17%。則新價格應訂為多少?
Answer explanation
定價-成本=獲利
x-成本=0.2成本
x=1.2成本=(12/10)成本
成本=10x/12
0.9新定價-(10x/12)=(10x/12)*(17/100)
0.9新定價-(10x/12)=(17x/120)
0.9新定價=(17x/120)+(10x/12)
0.9新定價=(17x/120)+(100x/120)
0.9新定價=(117x/120)
新定價=(117x/120)*(10/9)
新定價=
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
比較下列各式的大小:
<
>
=
Answer explanation
小於1的真分數或小數------次方數愈大,值愈小。
0.1x0.1=0.01
0.1x0.1x0.1=0.001
相反的,大於1的真分數或小數------次方數愈大,值愈大
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
計算下列各式的結果是什麼? (1) (2)
90
180
721
Answer explanation
(1)=(1+9)x(16+2)=180
(2)=
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
比較 、 何者較大?
Answer explanation
偶數次方為正數,奇數次方為負數
所以正數>負數
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