五年级整数+小数简算

整数简便运算199999+29999+3999+499+59+9101+102+99+103+104+98+97+106+96+100437-27-7399998＋9998＋998+98+9562-156+56756-（156+8）125×25×32×46+50×27÷25÷43636×99+3647×23+47×76+4738×7+31×142599×35103×121000÷8÷125100小数简便运算21.8－7.22－2.787.86－3.12－2.88＋5.143.4－5.8－4.2＋6.645.2×66.7＋66.7×53.8＋66.79.12＋9.12×9－6.020.25×32×0.1252.5×1.25×4×8（0.25＋2.5＋25）×40.125×3...