20+10=30用英语说是twenty plus ten is thirty吗?

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20+10=30用英语说是twenty plus ten is thirty吗?
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20+10=30用英语说是twenty plus ten is thirty吗?
20+10=30用英语说是twenty plus ten is thirty吗?

20+10=30用英语说是twenty plus ten is thirty吗?
加法和乘法中is和are都行,加法和除法都用is.
当然了,要保证对都用is就行,实在不会就都用equals.
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