145+398= 6-0.6= 0.24×50= 3﹣3÷7= (+)×56=
1.25×6×8= = = ÷0.75= ×4÷×4=
4.7+3= 8.4÷60%= 69×21≈ 1+ ÷1+ =
- = 0.92= 1.4× = 6× - =
÷ ×0= 0.25×125×40×0.8=
127+38= 8.8÷0.2= 2-1 = ×1 =
1÷7+ = 1-1× = + = 1.02-0.43=
÷25%× = ×2÷ ×2=