问题
解答题
简便计算 (1)(
(2)11.4×52%-1.4×0.52 (3)
(4)
|
答案
(1)(
-7 8
)×1 2
+13 5
×13 5
,5 8
=(
-7 8
+1 2
)×5 8
,13 5
=1×
,13 5
=
;13 5
(2)11.4×52%-1.4×0.52,
=11.4×0.52-1.4×0.52,
=(11.4-1.4)×0.52,
=10×0.52,
=5.2;
(3)
×27+16 23
×19,16 23
=
×(27+19),16 23
=
×46,16 23
=32;
(4)
×6+9÷6 7
-7 6
,6 7
=
×6+9×6 7
-6 7
,6 7
=(6+9-1)×
,6 7
=14×
,6 7
=12.