解答4.8×2.5的积4.8×2.5=121/6÷2.4=5/724.8×2.5的积加上1/6÷2.4的商12+5/72=12又72分之5
4.8×2.5+1/6÷2.4=12+1/6x5/12=12+5/72=12又5/72
4.8*2.5+1/6/2.4=12+1/6*5/12=12+5/72=12又5/72
4.8×2.5+1/6÷2.4=12+5/72=12又5/72