《2025年口算基础训练三年级数学上册人教版》

82 - 33 =
61 - 39 =
91 - 17 =
36 + 16 =
91 - 25 =
40 + 13 =
67 - 28 =
84 + 9 =
29 + 35 =
45 + 9 =
72 - 17 =
76 - 38 =
46 + 27 =
560 - 380 =
460 + 270 =
750 - 260 =
450 + 80 =
350 - 170 =
420 - 290 =

答案： 82 - 33 = 49
61 - 39 = 22
91 - 17 = 74
36 + 16 = 52
91 - 25 = 66
40 + 13 = 53
67 - 28 = 39
84 + 9 = 93
29 + 35 = 64
45 + 9 = 54
72 - 17 = 55
76 - 38 = 38
46 + 27 = 73
560 - 380 = 180
460 + 270 = 730
750 - 260 = 490
450 + 80 = 530
350 - 170 = 180
420 - 290 = 130

下面图形哪些是直角？在相应的( )里画“√”

(√) () () () (√) ()

答案： (√) ( ) ( ) ( ) (√) ( )

数出下列图形中各有多少个直角

答案： 2；0；1；12