问题 计算题
计算下面各题,能简算的要简算。
(1)254×99+254(2)7824-(275-1512÷28)
(3)864-299(4)2700-425-175
(5)5000-(720+14×15)÷31
答案

(1)原式=254×(99+1)

                =254×100

                =25400(2)原式=7824-(275-54)

                =7824-221

                =7603

(3)原式=864-300+1

                =564+1

                =565(4)原式=2700-(425+175)

                =2700-600

                =2100

(5)原式=5000-(720+210)÷31

                =5000-930÷31

                =5000-30

                = 4970

单项选择题
单项选择题