问题
解答题
|
答案
(1)762-450÷18×25
=762-625,
=137;
(2)1.5×(3.8-0.8)÷0.9,
=1.5×3÷0.9,
=5;
(3)8×
+2 7
÷5 7 1 8
=8×
+2 7
×8,5 7
=(
+2 7
)×8,5 7
=1×8,
=8;
(4)(1-
×70)÷1 100 2 7
=(1-
)÷7 10
,2 7
=
×3 10
,7 2
=
;21 20
(5)
÷[1÷(5 7
-2 3
)]1 5
=
÷[1÷5 7
],7 15
=
×5 7
,7 15
=
;1 3
(6)
+(36+4 5
)÷99 5
=
+36×4 5
+1 9
×9 5
,1 9
=
+4 5
+4,1 5
=5.