计算下列各题,能简算的要简算。
(1)884÷34+17×21
(2)1.25×3.2×0.25
(3)()÷+
(4)4÷5+39×
(5)4.2﹣1.38+5.8﹣4.62
(6)2÷﹣÷2
直接写得数.
0.25×40= 10.6﹣5.02= += ﹣=
7.6÷0.38= ×= 2﹣+= 2.8×25+1.2×25=
(1)1-0.47= (2)6.4-4=
(3)0.25×12= (4)
(5) (6)
(7)0.88÷2.2= (8)0.08×0.5=
(9) (10)72.1×1000=