问题
解答题
|
答案
(1)496+250×16,
=496+250×4×4,
=496+1000×4,
=496+4000,
=4496;
(2)10.2-(1.25+2.5)÷1.5,
=10.2-3.75÷1.5,
=10.2-2.5,
=7.7;
(3)
÷3 7
+5 6
×4 7
,6 5
=
×3 7
+6 5
×4 7
,6 5
=(
+3 7
)×4 7
,6 5
=1×
,6 5
=
;6 5
(4)
÷[9 20
×(3 4
+2 5
)],1 3
=
÷[9 20
×3 4
],11 15
=
÷9 20
,11 20
=
.9 11