简便计算 0.49×12.5×0.8; 5.61﹣5.61÷1.5; 0.45×78.2+20.8×0.45+0.45.
(连山区)解方程.x+=6x﹣2.4x=72.
(连山区)脱式计算.(1)101×9.7﹣9.7 (2)69×0.75+31×75% (3)32×19×125 (4)(﹣)×45.
(连山区)2÷0.1= ;6.35﹣1.9=;+1.4= ;0.36+0.4=;(2+)×28= ;7﹣﹣= ;×÷×= ;+=
(旅顺口区)计算. 25.2÷4.5+3.25×1.4 .
(旅顺口区)直接写得数. = ;= ;= ; = ;2.54×99+2.54= .