问题
解答题
|
答案
①73.25+
+26.75+4 7
,3 7
=(73.25+26.75)+(
+4 7
),3 7
=100+1,
=101;
②12.5×2.5×32,
=(12.5×8)×(2.5×4),
=100×10,
=1000;
③
×11 27
+1 7
÷7,16 27
=
×11 27
+1 7
×16 27
,1 7
=
×(1 7
+11 27
),16 27
=
×1,1 7
=
;1 7
④23.2×15+33.8÷2.6,
=348+13,
=361;
⑤(
+4 5
)÷1 4
+7 3
,7 10
=(
+16 20
)×5 20
+3 7
,7 10
=
×21 20
+3 7
,7 10
=
+9 20
,14 20
=
,23 20
=1
;3 20
⑥
÷(3-1 4
-5 13
),8 13
=
÷[3-(1 4
+5 13
)],8 13
=
÷[3-1],1 4
=
×1 4
,1 2
=
.1 8