看图列示计算。
写出差是8、7、6的减法算式,你能写出多少道?
(答案不唯一)
12-3=
12-7=
14-5=
18-9=
19-9=
+=11 +=11
+=11 +=11
-=9 -=9
-=9 -=9
-=(支)
12 – 7 = 12 – 4 = 12 – 9 = 12 – 6 =
13 – 5 = 13 – 9 = 13 – 7 = 13 – 4 =
11-5=
因为: + =11
所以:15-5=
15-7=
想:
先算:
再算:
7+8= 15-8= 17-7= 14-6=
12-4= 13+6= 9+4= 17-9=
13-0= 7+5=
12-6= 13-8= 8+3= 15-4=
9+2= 16-7= 12-9= 11-8=
11-4= 18-8= 14-5= 17-6=
15-8= 17-10= 2+7= 14-9=