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...simple addition and subtraction problems.是什么意思？

...simple addition and subtraction problems.

简单的加减题

相关词汇
simple addition and subtraction problems

simple

adj. 简单的，单纯的，易受骗的，天真的；n. 笨蛋，愚蠢的行为，出身低微者；

addition

n. 加，增加，附加，[数]加法，增加的人或事物；

and

conj. 和，与，而且，于是，然后，因此；

subtraction

n. 减，减法，减除法，减去；

problems

n. 问题( problem的名词复数 )，疑难问题，习题，思考题；
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