《2025年灵机一动小学数学口算心算一年级上册苏教版》

口算练习 26
1
4+5=9
5+4=9
9-5=4
3+6=9
6+3=9
9-3=6
9-6=3
7+2=9
1+7=8
9-9=0
9-8=1
2
7+0=7
5+2=7
5+3=8
5+4=9
2+7=9
9-6=3
8+1=9
0+9=9
8+0=8
4+2=6
9-8=1
3
9-0=9
2+4=6
3+5=8
8-5=3
4-2=2
5+0+3=8
2+1+6=9
2+1+3=6
5-2-2=1
7-1-4=2
2+2+1=5

答案： 1. $4 + 5 = 9$
$5 + 4 = 9$
$9 - 5 = 4$
$3 + 6 = 9$
$6 + 3 = 9$
$9 - 3 = 6$
$9 - 6 = 3$
$7 + 2 = 9$
$1 + 7 = 8$
$9 - 9 = 0$
$9 - 8 = 1$
2. $7 + 0 = 7$
$5 + 2 = 7$
$5 + 3 = 8$
$5 + 4 = 9$
$2 + 7 = 9$
$9 - 6 = 3$
$8 + 1 = 9$
$0 + 9 = 9$
$8 + 0 = 8$
$4 + 2 = 6$
$9 - 8 = 1$
3. $9 - 0 = 9$
$2 + 4 = 6$
$3 + 5 = 8$
$8 - 5 = 3$
$4 - 2 = 2$
$5 + 0 + 3 = 8$
$2 + 1 + 6 = 9$
$2 + 1 + 3 = 6$
$5 - 2 - 2 = 1$
$7 - 1 - 4 = 2$
$2 + 2 + 1 = 5$