小丽和小华共踢了144个毽子,小华踢的个数是小丽的2倍,小丽和小华各踢了多少个?
计算下面各题,能简算的要简算.67÷2.5÷0.4 27.5﹣13.58﹣6.42 9.88÷[5×(7.34﹣4.96)]15.4×5.8+5.8×4.6 4.2+14.8×(4﹣3.99) 15+(1.2+3.64×0.5)
脱式计算,能简算的要简算:46.5×99+46.5 4.85×1.25×8 (455﹣12.5×4)÷8.1(0.5+0.25)×4 39÷0.125÷0.8.
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①245﹣65﹣35 ②186+82+18 ③25×(4×27) ④8×(25+20) ⑤24×56+44×24⑥700÷4÷25 ⑦0.9+99×0.9 ⑧8.59﹣4.1×0.1﹣4.59 ⑨5.4×10.2 ⑩2.5×(40﹣4)