A:b﹥0
B:b-a﹤0
C:b-a﹥0
D:a+b﹥0
4800÷240=____ 25×12=____ 16.5÷10%=____ 34 + 512 =____
1- 712 + 512 =____ 0.3²=____ 1.02-0.43=____ 14÷ 27 =____
89 × 34 =____ 67 ×2÷ 67 ×2=____
完成下列进位制之间的转化:101101(2)=____ (10)=____ (7)