题目内容

计算。
(1)250×29×4 (2)(400+40)×25
(3)340÷5-18 (4)4040÷5+80
(5)78×6+22×6 (6)39+(61+50)
(7)99÷11×3 (8)(93+31)÷31
(1)原式=250×4×29
                =1000×29
                =29000
(2)原式= 400×25+40×25
                =10000+1000
                =11000
(3)原式=68-18
                =50
(4)原式=808+80
                =888
(5)原式=(78+22)×6
                =100×6
                =600
(6)原式=(39+61)+50
                =100+50
                =150
(7)原式=9×3
                =27
(8)原式=93÷31+31÷31
                = 4
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