1946 年后的数字计算：简单减法和加法练习
以下是将每一行数字减去 1946，再用 60 减去结果的计算结果：
1989 - 1946 + 60 = '23' 1974 - 1946 + 60 = '36' 1981 - 1946 + 60 = '29' 1972 - 1946 + 60 = '38' 1970 - 1946 + 60 = '40' 1970 - 1946 + 60 = '40' 1943 - 1946 + 60 = '67' 1980 - 1946 + 60 = '30' 1987 - 1946 + 60 = '23' 1965 - 1946 + 60 = '55' 1983 - 1946 + 60 = '47'
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