Subtracting 10s and 1s

               this week I have been learning how to tack away and this is how we do it.

                                    hope you like it 

Question	10’s	1’s	Answer
34-21=	30 - 20 = 10	4 - 1 = 3	13
64 -33 =	60-30=30	4-3=1	31
58-24=	50-20=30	8-4=4	34
74-53=	70-50=20	4-3=1	21
89-56=	80-50=30	9-6=3	33
53-22=	50-20=30	3-2=1	31
34-13=	30-10=20	4-3=1	21
53-11=	50-1=40	3-1=2	42
25-12=	20-10=10	5-2=3	13
53-31=	50-30=20	3-1=2	22
46-25=	40-20=20	6-5=1	21
64-31=	60-30=30	4-1=3	33
78-53=	70-50=20	8-3=5	25
53-21=	50-20=30	2-1=1	31
42-11=	40-10=30	2-1=1	31
69-46=	60-40=20	9-6=3	23