1.1.31×12.5×0.15×16的值是:( )
A.39.3 B.40.3 C.26.2 D.26.31
2. 84.78元、59.50元、121.61元、12.43元以及66.50元的总和是:( )
A.343.73 B.343.83 C.344.73 D.344.82
3. 1 +3+5+7+9+......+399的值为:( )
A.160000 B.80000 C.60000 D.40000
4. 454+999×999+545的值为:( )
A.899998 B.999998 C.1008000 D.999000
5.85.7-7.8+4.3-12.2的值是:( )
A.60 B.70 C.80 D.81
【1】0,6,24,60,120,( )
A.125 B.196 C.210 D.216
【2】34,36,35,35,( ),34,37,( )
A.36,33 B.33,36 C.37,34 D.34,37
【3】1,52,313,174,( )
A.5 B.515 C.525 D.545
【4】6,7,3,0,3,3,6,9,5,( )
A.4 B.3 C.2 D.1
【5】1,393,3255,( )
A.355 B.377 C.137 D.397