52乘以11.1减2.6乘以77.8简算

52乘以11.1减2.6乘以77.8简算 2000乘以1999减1999乘以1998加1998乘以1997减1997乘以1996,简算 5436乘以5438减5435乘以5439简算 1994乘以199319931993减1993乘以199419941994简算 0.25乘以1.25乘以8乘以40=简算 1.1乘以四分之一+0.25乘以5.8+3.1乘以四分之一 简算 512乘以81+11乘以825+637乘以19 简算 512乘以81+11乘以825+637乘以19 简算 简算4.80乘以0.59+0.41乘以1.59--0.324乘以5.94.83乘以0.59+0.41乘以1.59--0.324乘以5.9 75乘以1/76乘以77简算 1.36乘以4乘以2.5=简算 2.8乘以0.65+2.8乘以0.35简算 4.2乘以1.2减5.2乘以0. 72乘以2.09减1.8乘以73.6 (-7)乘以(-11)减12乘以(-8) 101乘以四分之一减0.25简算 3.33乘以6.66简算 2.37乘以2.7简算