1. 直接写出得数。(每题1★)
$9+8= $ $16-3= $ $5+13-8= $
$12-7= $ $13-8= $ $19-9+5= $
$17-9= $ $19-6= $ $13-5+3= $
$11-2= $ $15-3= $ $13-4+9= $
$16-6= $ $6+7= $ $14-5-9= $
$16-9= $ $15-6= $ $10-3+8= $
$14-6= $ $14-7= $ $16+1-10= $
$12-6= $ $11-8= $ $12+4-7= $
$16-7= $ $15-7= $ $11-3+5= $
$13-5= $ $17-8= $ $6+8-9= $
$12-4= $ $11-5= $ $18-9+4= $
$15-5= $ $12-8= $ $7+4-6= $

17 13 10 5 5 15
8 13 11 9 12 18
10 13 0 7 9 15
8 7 7 6 3 9
9 8 13 8 9 5
8 6 13 10 4 5

2. 比一比,填一填。(12★)
24 35 73 92 100 14 21 64 31 22

大于50的数:
73 92 100 64
小于50的数:
24 35 14 21 31 22
大于30且小于92的数:
35 73 64 31