简算4.9+0.1﹣4.9+0.110.78﹣(2.78+3.693)99.99×22.22+33.33×33.34(2.5×2.5+2.5×2.5+2.5×2.5+2.5×2.5)×8.
简便运算。25×125×32756+98
简便运算。5600÷25÷425×678×4
简便运算。97×47+3×4724×125
简便运算。865-245-155566-87-112
简便运算。452-29947+56+53+34