25%×99+25%
19.3-(9.3+4.55)
0.4×25%=
0.27+0.73=
0.5÷0.01=
0.99÷0.11=
6-6÷7=
6.12+0.7﹣1.12= 10﹣﹣= 23=
1÷1%= 1.5π≈ 0.5××2×=