三、观察物体（一）
★信息窗1-2
建议用时:6分钟
实际用时:分钟
$7×3 =$
$20÷4 =$
$3×8 =$
$56÷8 =$
$4×9 =$
$49÷7 =$
$23÷5 =$
$17÷8 =$
$16÷3 =$
$25÷8 =$
$2÷2 =$
$6×8 =$
$27÷3 =$
$3×3 =$
$18÷3 =$
$20+73 =$
$19+80 =$
$84-6 =$
$6+38 =$
$61-9 =$
$32-14 =$
$67-28 =$
$85-43 =$
$52+39 =$
$34+62 =$
$63+9 =$
$58+30 =$
$65+13 =$
$79+13 =$
$85-40 =$
$56+35 =$
$76-36 =$
$270-100 =$
$520+60 =$
$410+270 =$
$880-350 =$
$560-280 =$
$910-570 =$
$260+740 =$
$1000-70 =$
$130+260 =$
$470+110 =$
$490-250 =$
$690-460 =$
$50+306 =$

7×3 = 21
20÷4 = 5
3×8 = 24
56÷8 = 7
4×9 = 36
49÷7 = 7
23÷5 = 4……3
17÷8 = 2……1
16÷3 = 5……1
25÷8 = 3……1
2÷2 = 1
6×8 = 48
27÷3 = 9
3×3 = 9
18÷3 = 6
20+73 = 93
19+80 = 99
84-6 = 78
6+38 = 44
61-9 = 52
32-14 = 18
67-28 = 39
85-43 = 42
52+39 = 91
34+62 = 96
63+9 = 72
58+30 = 88
65+13 = 78
79+13 = 92
85-40 = 45
56+35 = 91
76-36 = 40
270-100 = 170
520+60 = 580
410+270 = 680
880-350 = 530
560-280 = 280
910-570 = 340
260+740 = 1000
1000-70 = 930
130+260 = 390
470+110 = 580
490-250 = 240
690-460 = 230
50+306 = 356

拓展园地
今年，姐姐比乐乐大5岁。11年后，姐姐比乐乐大几岁？

5