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The seventh grade mathematics first volume addition and subtraction mixed operation
①-2? ÷4/9×(-3/2)? =-8 1/2

②3 1/9×(-7.2)÷(-2 2/5)×(-0.9? )=-7.56

③(-2)? -2×(-4)÷( 1/4)=24

④-4? +16×(- 1/2) Quadratic =- 15

⑤( 1.2-3.7)? ×(- 1)2005 ÷( 1/2)? ×0.5=-25

⑥(-4)? ×(-2)÷[(-2)? -(-4)]=8

⑦- 10? +[(-4)? -( 1-3? )×2]=-968

⑧(- 1)? ×5÷[-3? +(-2)? ]=- 1

Pet-name ruby-1fourth power +(-2)? ÷4×[5-(-3)? ]=7

⑩-(-2)? -3÷(- 1)? +0×(-2)? =- 1

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