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Wednesday, 2 August 2017

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

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