A.本位差B.本位和C.向高位產(chǎn)生的進(jìn)位數(shù)D.向低位產(chǎn)生的借位數(shù)
A.被加數(shù)B.加數(shù)C.借位數(shù)D.低位送來的進(jìn)位數(shù)