在横线里最大能填几.7× <60 8× <35 5× <4642>8× 27> ×4 65> ×9.
用简便方法计算. (1)2.4×1.2+7.6×1.2 (2)0.25×38.6×0.4 (3)(4+0.4)×25 (4)0.8×4.6×12.5 (5)4.9×99 (6)12.8+12.8×9 (7)0.125×0.32×2.5 (8)0.99÷1.5 (9)9.9×9+9.9.
计算,能简便的要简便 (1)3﹣﹣(2)÷+÷(3)36×(+)÷.
简便方法计算 ①245﹣65﹣35②186+82+18③25×(4×27)④8×(25+20) ⑤24×56+44×24 ⑥700÷4÷25⑦0.9+99×0.9 ⑧8.59﹣4.1×0.1﹣4.59 ⑨5.4×10.2⑩2.5×(40﹣4)
用简便方法计算. 427﹣156﹣441230﹣299137+149+163.
598+599+600+601+602 = × = .