计算 245 + 678 的结果是多少?

数学小测验

Quiz
•
Mathematics
•
University
•
Hard
Hui J
FREE Resource
23 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
823
913
923
933
Answer explanation
计算 245 + 678,结果为 923。因此,正确答案是 923。其他选项均不正确。
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
如果一个长方形的长是12厘米,宽是8厘米,它的面积是多少平方厘米?
20
40
80
96
Answer explanation
长方形的面积计算公式是长乘以宽。这里长是12厘米,宽是8厘米,所以面积是12 * 8 = 96平方厘米。因此,正确答案是96。
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
1500毫升等于多少升?
0.15升
1.5升
15升
150升
Answer explanation
1500毫升等于1.5升,因为1升等于1000毫升。将1500毫升除以1000毫升/升,得到1.5升。因此,正确答案是1.5升。
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
一个圆形披萨被均匀地切成8块。小明吃了3块,小红吃了2块。还剩下多少块?
2
3
4
5
Answer explanation
披萨总共有8块,小明吃了3块,小红吃了2块,总共吃了5块。剩下的块数是8 - 5 = 3块。因此,正确答案是3。
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
如果2x + 3 = 11,那么x的值是多少?
3
4
5
6
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
一个正方形的周长是28厘米。它的边长是多少厘米?
4
6
7
14
Answer explanation
正方形的周长公式是4倍边长。设边长为x,则4x=28,解得x=7。因此,正方形的边长是7厘米。
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
75 ÷ 5 × 3 = ?
5
15
35
45
Answer explanation
To solve 75 ÷ 5 × 3, first divide: 75 ÷ 5 = 15. Then multiply: 15 × 3 = 45. Therefore, the correct answer is 45.
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