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· 33字 · 1分钟
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39＋(4÷2)＝41 (83×88)＋85＝7389 33÷3＋28＝39
46－14＝32 25×49＝1225 44.15＋41.45＝85.6
52.6－16.58＝36.02 (16÷4)＋24＝28 144÷6＝24
(63÷3)＋61＝82 (91－19)×88＝6336 13＋46＝59
144×58＝8352 31.99＋34.81＝66.8 76＋(15÷3)＝81
621÷9＝69 75×79＝5925 86.14－20.89＝65.25
66×32＝2112 58.8－57.8＝1.0 83－9＝74
49×(47－26)＝1029 46＋(60×34)＝2086 93.51－21.48＝72.03
$\frac{11}{17}$＋$\frac{1}{17}$＝$\frac{12}{17}$ $\frac{49}{57}$－$\frac{5}{57}$＝$\frac{44}{57}$ $\frac{8}{10}$－$\frac{2}{10}$＝$\frac{6}{10}$
$\frac{33}{45}$＋$\frac{11}{45}$＝$\frac{44}{45}$ $\frac{40}{45}$＋$\frac{2}{45}$＝$\frac{42}{45}$ $\frac{12}{24}$＋$\frac{9}{24}$＝$\frac{21}{24}$
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