问题
解答题
简便计算. 57.5-4.25-15.75 125×32
|
答案
57.5-4.25-15.75
=57.5-(4.25+15.75)
=57.5-20
=37.5;
125×32
=125×8×4
=1000×4
=4000;
×7 12
+2 3
×1 3 7 12
=
×(7 12
+2 3
)1 3
=
.7 12
简便计算. 57.5-4.25-15.75 125×32
|
57.5-4.25-15.75
=57.5-(4.25+15.75)
=57.5-20
=37.5;
125×32
=125×8×4
=1000×4
=4000;
×7 12
+2 3
×1 3 7 12
=
×(7 12
+2 3
)1 3
=
.7 12