7岁的孩子中1/4以上都不会正确地做加法运算。More than a quarter of seven year-olds cannot add up properly.那是简单的加法.That is a simple addition.加号用于加法;减号用于减法.The plus sign is used in addition and the minus is used in subtraction....

“加法”的拼音为：jiā fǎ...

“加法”的英语可以翻译为：[数] addition，additive ...

“加法”的反义词：减法。...