直接写出得数80÷4= 24÷2= 58﹣44= 63﹣28= 42+19= 64+24=1400﹣500= 800+600= 70÷7= 4×60= 200+3000= 10000﹣4000=
直接写出得数．===== 1﹣=
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25×8= 8.5﹣3.7= 0.56÷0.07= 4×9.2×0.25======
直接写出结果． 12÷0.4= 9.9×50= 2+0.75=+= 3+= 0.5×40= 2﹣=﹣=
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