19.98×37﹣199.8×1.9+1998×0.82 888+32×0.125×0.257.8÷[32×(1﹣)+3.6] +++…+.
怎样简便怎样计算: (1)31.2×91+3.12×90(2)0.25×3.2×12.5(3)2.95×101﹣2.95 (4)89×100.1(5)99÷0.25÷0.4(6)35.6﹣6×1.73.
简便计算 99﹣9.9÷0.25÷0.4; 101×0.59; (+﹣)÷.
285+195+105+415.
用简便方法计算. 45×102 4.93×101﹣4.93 63×( ++) 400÷1.25÷8.
25×32.