怎样简便怎样算.4.52-0.74-0.2674×58+14÷854.8×99+4.8(2.5-2.5×60%)÷4215×3+1315÷1327-613×27.-六年级数学
题文
怎样简便怎样算. 4.52-0.74-0.26
4.8×99+4.8 (2.5-2.5×60%)÷4
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答案
(1)4.52-0.74-0.26, =4.52-(0.74+0.26), =4.52-1, =3.52; (2)
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(3)4.8×99+4.8, =4.8×(99+1), =4.8×100, =480; (4)(2.5-2.5×60%)÷4, =[2.5×(1-0.6)]÷4, =[2.5×0.4]÷4, =1÷4, =0.25; (5)
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