一年级天天练67.doc

1. 限时计算
17+6 = 32-12 =
22-7 = 40-27 =
21+23= 24-15 =
39-12 = 31-16 =
11+29 = 19+18-17 =
22-8 = 32-5-15 =
21+19 = 32-16+8 =
24+18 = 20+12+8 =
17+13 = 18-19+2 =
22+28 = 1+2+3+4+5+6+7+8+9 =

2. 头脑风暴
将16头羊赶到下面的八个羊圈中（不包括中心），要求每横行，每竖列三个数的和都是7，该如何安排。