问题
解答题
灵活计算.
|
答案
(1)952-952÷17,
=952-56,
=896;
(2)(
-3 4
×3 4
)÷2 5
,1 5
=(
-3 4
)÷3 10
,1 5
=
÷9 20
,1 5
=
;9 4
(3)(
+5 12
)×12+1 19
,7 19
=
×12+5 12
×12+1 19
,7 19
=5+
+12 19
,7 12
=5+(
+12 19
),7 12
=5+1,
=6;
(4)1.28×5.37-2.8×0.537,
=1.28×5.37-0.28×5.37,
=(1.28-0.28)×5.37,
=1×5.37,
=5.37;
(5)
×2 7
+11 15
÷4 15
,7 2
=
×2 7
+11 15
×4 15
,2 7
=
×(2 7
+11 15
),4 15
=
×1,2 7
=
;2 7
(6)
×1 21
×(2009×42×85),1 17
=
×1 21
×2009×42×85,1 17
=2009×2×5,
=2009×(2×5),
=2009×10,
=20090.