问题
解答题
3÷〔9×(
93.6÷〔(6-2.88)×(5
7.05×37+64×7.05-7.05 (2
8
8.1÷(4
|
答案
(1)3÷[9×(
-1 27
)]×12,1 36
=3÷[9×
-1 27
×9]×12,1 36
=3÷[
-1 3
]×12,1 4
=3÷
×12,1 12
=36×12,
=432;
(2)93.6÷[(6-2.88)×(5
-1.875)],7 8
=93.6÷[3.12×4],
=93.6÷12.48,
=7.5;
(3)7.05×37+64×7.05-7.05,
=7.05×(37+64-1),
=7.05×100,
=705;
(4)(2
×2 9
+24 5
×6.2-5.8×22 9
-2 9
÷1 5
)×9 20
,9 20
=(
×0.8+20 9
×6.2-5.8×20 9
-20 9
×0.2)×20 9
,9 20
=[
×(0.8+6.2-5.8-0.2)]×20 9
,9 20
=[
×1]×20 9
,9 20
=
×20 9
,9 20
=1;
(5)8
÷[7.8+4 5
×(2.75+1.25)],1 4
=8
÷[7.8+4 5
×4],1 4
=8
÷(7.8+1),4 5
=8.8÷8.8,
=1;
(6)8.1÷(4
-0.05×70)÷11 7
,2 7
=8.1÷(4
-3.5)÷11 7
,2 7
=
÷81 10
÷9 14
,9 7
=
×81 10
×14 9
,7 9
=
.49 5