第 1 题
1 分What is the sum of 15 and 8?
Key Stage 1 (KS1) · Mathematics
加法與減法：练习题
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第 2 题
1 分Peter has 54 marbles. He gives some to his brother and has 37 left. How many marbles did he give away?
第 3 题
1 分Subtract 12 from 40.
第 4 题
4 分There are 15 apples in a basket. 7 are red and the rest are green. How many more red apples are there than green apples?
先自己写一遍答案，再对照解题步骤。
第 5 题
5 分A bag has 48 marbles. Peter takes 12 marbles, and Jane takes 15 marbles. How many marbles are left in the bag?
先自己写一遍答案，再对照解题步骤。
第 6 题
4 分Tom has 15 red marbles and 8 blue marbles.
a) How many marbles does he have in total?
b) If he gives 5 marbles to his sister, how many marbles does he have left?
先自己写一遍答案，再对照解题步骤。
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