问题
填空题
7.2×61
|
答案
7.2×61
+73.8×23 10
,4 5
=7.2×61.3+(61.3+12.5)×2.8,
=(7.2+2.8)×61.3+12.5×2.8,
=613+35,
=648.
7.2×61
|
7.2×61
+73.8×23 10
,4 5
=7.2×61.3+(61.3+12.5)×2.8,
=(7.2+2.8)×61.3+12.5×2.8,
=613+35,
=648.