+ = 0.24×5= 4.8÷10%= 20×( + )= 36×25%=
12.6÷0.3= ×2.4= - ×0= 632÷69≈ 7.99×9.99%≈
2.5×4= 10-3.7= 5.6×10%=
37+25= 0.8÷0.002= 81÷3=
3.2÷0.01= 2.2×9.9= 305-199=
2.05×4= 8×12.5%=