题目内容

脱式计算。
(1)3-2+5-1 (2)9×4.25+4×
(3)(1+2)÷(2-1 (4)2.25×+2.75÷1+60%
(5)9.81×0.1+0.5×98.1+0.049×981 (6)(6-3)÷(13+11
(1)原式=(3+5)-(2+1
    =9-4
    =5
(2)原式=(9+)×4
    =10×4
    = 42.5
(3)原式=(1+2)÷
    =×2
    =7
(4)原式=2.25×+2.75×+60%
    =(2.25+2.75+1)×
    =3.6
(5)原式=9.81×(0.1+5+4.9)
    =98.1
 
 
 
(6)原式=(6-3)÷(13+11
    =÷24
    =
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