简便计算
(1)9999+9998+9997+9996(2)22222×999999
(3)454十999×999十545(4)20082008×2007﹣20072007×2008.
计算下面各题,怎样简便就怎样算.×0.25+0.375×
4.97+6.38+5.03﹣4.38
5.84×1.36+13.6×0.316+1.36﹣
÷
×0.5.
下面各题怎样简便就怎样算.
3.7×99+3.7+
﹣
5.37﹣1.47﹣2.53
105×(+
)13+45÷9
×
+
×
.
9999×7778+3333×6666.
下列各题怎样简便就怎样算
(1)7.8×36+78×6.4(2)74×14+111×24.