列竖式计算(1)46×135=(2)70×370=
用简便算法计算下面各题 102×0.35(8+0.8)×1.257.7×1.7+2.3×7.7 2.98×0.25×400.28×990.44×2.5.
用简便方法计算下列各题. 137+86+63254+(524+146) 262﹣186﹣14 381﹣199228+107323﹣(223+65) 178+297168+249+132+451694+238﹣594.
下面各题怎样算简便就怎样算. 36×1990.54×1.75+8.25×0.542.5﹣÷﹣÷.
75+44+125+66+568×5×125×40 78×45+21×45+4535×98.
简便计算. 8.2×99+8.28.8×12.5 0.78×9.9 12.5×3.4×0.84.5×13.6+55×1.36.