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÷7= =
24× = 40÷10%= 100×71%= 60×50%=
3.99+0.1= 1÷1%= ÷3= 6- = 0.25× ×4=
5-3.09= = 4.3+3.57= 1.9-2÷4= 4× ÷4× =
7× = 75%+25%= = =
= ×0.15= 240×5%= =
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