14-4 16-6 13-3 11-1 19-9 15-5 12-2 18-8 10-□=3 10-□=6 10-□=4 10-□=9 10-□=10 10-□=5 10-□=1 14-4 16-6 13-3 11-1 19-9 15-5 12-2 18-8

17 - 5=( ) 12 10 7 7-5=2 take away from ones : 10+2=12 add with tens :

15 - 7 =( ) 8 5 10 10-7=3 take away from tens : 3+5=8 add with ones :

15-7＝ 8 5 10 10 10-7=3 take away from tens : 3+5=8 add with ones :

15-7＝ 8 10 10-7=3 take away from tens : 3+5=8 add with ones :

2 10 12-4＝ 8 10-4=6 6+2=8 First take away from tens: Second add with ones:

Write down the steps by the picture. 14- =( ) _________ First step: _________ Second step: Write down the steps by the picture.

Write down the steps by the picture. 11- =( ) _________ First step: _________ Second step: Write down the steps by the picture.

I use the chart to calculate, I can't take away 8 counters. tens ones 1 ten =( ) ones 10 15 - 8=( ) _________ First step: _________ Second step: I use the chart to calculate, I can't take away 8 counters.

11-6 14-7 12-9 15-6 11-9 7 5 1 6 2 9