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题型:单选题 题类:常考题 难易度:容易
新人教版数学二年级上册第二章2.1.2进位加课时练习
73–37= 38+45= 81–5= 56÷7=
270–90= 720-400= 340+470= 22÷2=
30×4= 312×2≈ 460+250= 270-90=
+ = - = 1- =
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