知识与能力训练四年级英语上教版
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在“数学文化周”中，同学们参加了“我是清点小能手”活动。快来看看谁清点得又快又准确吧！
①I have
four
toy cars. You have
five
toy cars. How many toy cars do we have?
We have
nine
toy cars.
Four
plus
five
equals
nine
.
4
+
5
=
9
.
② I have
two
teddy bears. You have
four teddy bears
.
How many
teddy bears do we have?
We
have
six teddy bears.
Two
plus
four
equals
six
.
2
+
4
=
6
.
答案：①B: four, five; G: nine; Four plus five equals nine.; 4+5=9
解析：根据示例，先确定总数，再分两部分，用加法算式表示。假设共有9辆玩具车，我有4辆，你有5辆，算式4+5=9。
②B: two, four teddy bears, How many; G: have; Two plus four equals six.; 2+4=6
解析：同理，假设共有6个泰迪熊，我有2个，你有4个，算式2+4=6。（答案不唯一，合理即可）
活动中，同学们需根据“已有物品清单”及“所需物品清单”进行核对，统计出还需要购买的物品及数量。快来一起算算吧！
① We need
twelve
toy cars. We have
nine
toy cars.
Twelve
minus
nine
equals
three
. We need
three
toy cars.
② We need
eight teddy bears
. We have
six teddy bears
.
Eight
minus
six
equals
two
. We need
two teddy bears
.
答案：（因“已有物品清单”和“所需物品清单”具体数量未明确，根据示例格式，假设数据如下）
① We need twelve toy cars. We have nine toy cars. Twelve minus nine equals three. We need three toy cars.
② We need eight teddy bears. We have six teddy bears. Eight minus six equals two. We need two teddy bears.
解析：根据示例，用所需数量减去已有数量得到需要购买的数量，此处假设所需玩具车12辆，已有9辆，需3辆；所需泰迪熊8个，已有6个，需2个。（实际需根据具体清单数据计算）
