二、解决问题
★信息窗 2-3
建议用时:6分钟
实际用时:分钟
35+4 =
48+27 =
27÷3 =
62÷8 =
28÷4 =
160-80 =
20+40 =
14-6 =
70+7 =
14÷6 =
70-40 =
500-250 =
10+250 =
135+20 =
570+130 =
88-8 =
39-30 =
80+20 =
8×8 =
5×7 =
290+60 =
45+50 =
400-20 =
370-160 =
45+25 =
220-160 =
30+605 =
76-8 =
253+500 =
72+19 =
180+250 =
56+36 =
310-70 =
210+90 =
61-22 =
67+500 =
820+80 =
68-52 =
620+190 =
360-180 =
25+43 =
249+1 =
430+150 =
53+47 =
720-240 =

35+4 = 39
48+27 = 75
27÷3 = 9
62÷8 = 7……6
28÷4 = 7
160-80 = 80
20+40 = 60
14-6 = 8
70+7 = 77
14÷6 = 2……2
70-40 = 30
500-250 = 250
10+250 = 260
135+20 = 155
570+130 = 700
88-8 = 80
39-30 = 9
80+20 = 100
8×8 = 64
5×7 = 35
290+60 = 350
45+50 = 95
400-20 = 380
370-160 = 210
45+25 = 70
220-160 = 60
30+605 = 635
76-8 = 68
253+500 = 753
72+19 = 91
180+250 = 430
56+36 = 92
310-70 = 240
210+90 = 300
61-22 = 39
67+500 = 567
820+80 = 900
68-52 = 16
620+190 = 810
360-180 = 180
25+43 = 68
249+1 = 250
430+150 = 580
53+47 = 100
720-240 = 480

拓展园地
请按照下列图形的规律,补全最后一个图形。

补全的2×2方格内容：
第一行：左格为绿色圆形，右格为尖角朝左的红色心形
第二行：左格为粉色圆形，右格为蓝色圆形
答：最后一个2×2方格左上是绿色圆形，右上是尖角朝左的红色心形，左下是粉色圆形，右下是蓝色圆形。