如果500张纸厚50cm,那么一张纸厚 cm.
(1)80.8×0.25﹣76.44÷7.8(2)2.8+7.2÷0.2×40(3)(2.5+1.25)×0.4×8(4)12.34×100.1﹣12.34×0.1(5)(1÷0.2﹣0.2÷1)÷(2.4×2)(6)41.8÷[31.52+25.7×(0.76÷1.9)].
简便算法17.08×2.53﹣7.08×2.53 100×0.97×99+3×9919.25×9.5+19.25×0.4+0.1×19.25.
125×12=1250+250 .
根据运算定律在□填数,在○里填运算符号.(35+26)×4=(□○□)○(□○□)740÷37÷2=740÷(□○□)125×26﹣125×18=(□○□)○□
59×99+59= ×( + ),这是根据乘法 进行简便计算的.