问题
解答题
|
答案
①1.8+3.84÷(15-12.6),
=1.8+3.84÷2.4,
=1.8+1.6,
=3.4;
②8×(
+1 18
),5 8
=8×
+8×1 18
,5 8
=
+5,4 9
=5
;4 9
③
÷[5×(5 8
-5 6
)],3 4
=
÷[5×5 8
],1 12
=
÷5 8
,5 12
=
;3 2
④0.4×80×2.5×0.125,
=(0.4×2.5)×(80×0.125),
=1×10,
=10.