摘要：10-9= 4+5= 6+3= 7―6= 7―4= 5―4= 6―2= 8―8= 8+2= 6+3= 3+7= 9-8= 6+0= 10―3= 10―0= 4+4= 10―4―2= 2+4+3= 1+8+0= 1+6+2= 7―6―0= 9―4―5=
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6-2 = | 18 ÷9= | 5.6× = |  + = | 8÷= |
 ÷0.8= | 3.6-1= | × = | 3.14×4= |  + = |
+2 = | 0.45÷ = | 55÷ = | 8÷ = | 10-9.45= |
3 +4 = | 0.36×100= | 0.5÷100= | 1× = | ÷7= |