问题
解答题
|
答案
(1)62.8×19-8×62-62
=1193.2-496-62,
=635.2;
(2)3.64×[1÷(2-2.09)]
=3.64×[1÷(-0.09)],
=
×(-91 25
),100 9
=-
;364 9
(3)1.9-1.9×(1.9-1.9)
=1.9-1.9×0,
=1.9-0,
=1.9;
(3)(1-1%×70)÷0.32O
=(1-0.7)÷
,8 25
=
×3 10
,25 8
=
.15 16