:2,3,10,25,52,97,()
A.36
B.152
C.168
D.174
-3,-1,0,2,10,() A.15 B.20 C.47 D.52
2,3,10,25,52,97,() A.36B.152C.168 D.174
2,3,10,25,52,97,()。 A.136 B.152 C.168 D.174
1,7,15,27,45,()A.36B.52C.71D.74
用竖式计算。(第(3)小题要验算)(1)204×25(2)821÷37(3)400÷52
简算 102×0.450.25×3.2×12.52.5×1.2+2.5×1.8+2.54.8÷0.5÷6.