P2 数学 真题样题

正确答案：D. 9

考点图表：读象形统计图（一个图案代表 3） · Picture graphs: each picture stands for 3

思路：Yellow 有 3 个心，每个心代表 3 个学生，3 × 3 = 9。
Think: Yellow has 3 hearts. Each heart stands for 3 students. 3 × 3 = 9.
小提醒：不要只数图案，要乘上每个图案代表的数。
Tip: Do not just count the pictures. Multiply by what each picture stands for.

正确答案：C.

考点分数：相等部分与涂色 · Fractions: equal parts and shading

思路：1/5 要分成 5 个相等的部分，涂 1 份。只有第三个图（third figure）是这样。
Think: 1/5 means 5 equal parts with 1 part shaded. Only the third figure shows this.
小提醒：每一份必须一样大。第四个图虽然也是 5 份，但大小不一样。
Tip: All parts must be the same size. Check that the parts are equal.

正确答案：B. 10

考点图表：读象形图并解题 · Graphs: reading a picture graph

思路：西瓜有 5 颗星，每颗代表 5 个，一共 5 × 5 = 25 个。卖了 15 个，25 − 15 = 10，还剩 10 个。
Think: Watermelon has 5 stars. 5 × 5 = 25 watermelons. 25 − 15 = 10 are left.
小提醒：先把星星换成水果的个数。
Tip: Change the stars into the number of fruits first.

正确答案：B. 45 min

考点时间：求经过的时间（同一小时内） · Time: finding the time interval within the same hour

思路：从 9:05 到 9:50，都在 9 点里，只看分钟：50 − 5 = 45，所以是 45 分钟。
Think: From 9:05 to 9:50 the hour stays the same. 50 − 5 = 45, so it is 45 min.
小提醒：小时相同时，用分钟相减。
Tip: When the hour is the same, just subtract the minutes.

正确答案：B. $17.70

考点钱：数纸币和硬币的总额 · Money: counting notes and coins

思路：先加纸币：$10 + $5 + $2 = $17。再加硬币：50¢ + 10¢ + 10¢ = 70¢。一共 $17.70。
Think: Add the notes first: $10 + $5 + $2 = $17. Then the coins: 50¢ + 10¢ + 10¢ = 70¢. Altogether $17.70.
小提醒：先数纸币，再数硬币，不要漏掉。
Tip: Count the notes first, then the coins. Do not miss any.

正确答案：B.

考点分数：认识二分之一（等分） · Fractions: recognising 1/2 as two equal parts

思路：一半（1/2）要把图形分成大小相同的两份，涂一份。(2) 三角形上面的小三角形比下面那一块小很多，两份不一样大，所以不是一半。
Think: 1/2 means 2 equal parts, 1 part shaded. In (2) the top part is much smaller than the bottom part, so it is not one half.
小提醒：先看两份是不是一样大。
Tip: Always check that the parts are equal first.

正确答案：C.

考点规律：立体图形的重复规律 · Patterns: repeating pattern of solid figures

思路：每 3 个重复一次：横放的圆柱、黑色圆柱、高圆柱。第 7 个本来应该是“横放的圆柱”，图中却是站着的矮圆柱。
Think: The pattern repeats every 3: lying cylinder, black cylinder, tall cylinder. The 7th figure should be a lying cylinder.
小提醒：三个一组地圈一圈，就容易找到错的。
Tip: Group the figures in threes to find the wrong one.

正确答案：C. the long box on the right pan

考点比较质量：用天平比较轻重 · Comparing mass with a balance

思路：天平是平的，说明右边的长箱子和左边两个箱子加起来一样重，所以长箱子比左边任何一个箱子都重。
Think: The balance is level, so the long box weighs the same as the two left boxes together. It is heavier than each of them.
小提醒：天平平衡＝两边一样重。
Tip: A level balance means both sides have the same mass.

正确答案：C. 670

考点质量：读刻度秤（每小格 10 g） · Mass: reading a weighing scale with 10 g marks

思路：这个秤每一小格是 10 g。指针在 600 后面第 7 小格，所以是 600 + 70 = 670 g。
Think: Each small mark on this scale is 10 g. The pointer is 7 small marks after 600, so the mass is 600 + 70 = 670 g.
小提醒：先看每一小格代表多少，再数格子。
Tip: First find what one small mark stands for, then count the marks.

正确答案：D.

考点规律：按形状和颜色完成立体图形规律 · Patterns: completing a pattern of solids by shape and colour

思路：规律是 4 个一组重复：涂色正方体、白色圆柱、涂色圆柱、白色长方体。问号前是白色圆柱，下一个是涂色圆柱。
Think: The pattern repeats in groups of 4: shaded cube, white cylinder, shaded cylinder, white cuboid. After the white cylinder comes the shaded cylinder.
小提醒：先找出重复的一组，再看问号在组里的哪个位置。
Tip: Find the group that repeats, then see where the ? is in the group.