直接写得数
049+0149= 1.01﹣0.1= 30+0.15= 13+0.13= 12.6.2﹣3.8=
5.4﹣2.5﹣1.4= 2.14﹣0.9= 7+0.25= 0.99+1.8= 5.6+1.01=
7.5+2.54= 4﹣0.25=
(1)×(
+
)(2)101×2.85﹣2.85(3)
÷[(
+
)÷
].
计算下面各题,能简算的要简算
149+587+51 75×0.5+15×0.5(﹣
)×45 8×
×12.5.
计算下面各题,能简算的要简算.
(1)2300﹣450÷18×18(2)0.8×1.6+8×0.84 (3)2.5×32×12.5.
直接写得数
720×490÷9÷8==
=
=
=5600÷(700÷25)=
12×(7﹣5
)=898+6÷7÷9×21=144÷2.4+144÷3.6=
2+99+999
+9999
+99999
=
下面各题怎样简便就怎样算.÷
×512÷(
﹣
)
÷9+
×
2.87+5.6﹣0.87+4.4+
×
+
48×(
+
﹣
)