WALT: Practice the strategies we have learn’t this term.
1. Use basic facts to work out these sums.
e.g. 40-30= is similar to 4-3=1, so 40-30= 10.
10+50=60
90-40=50
30+20=50
90-40=50
30+20=50
2. Make tens so work out these sums.
6 + 2 + 4=12
6 + 2 + 4=12
1 + 2 + 5 + 7 + 9 + 5 +3 =32
30 + 60 + 70 + 40=
30 + 60 + 70 + 40=
3. Go back through ten to work out these sums.
e.g. 15-7=
15-5-2=
e.g. 15-7=
15-5-2=
10-2=8
15-6=9
20-5=15
16-9=7
4. Solve sums with both addition and subtraction.
e.g. 4 + 2 + 5 - 9=
5 + 4 = 9, so I can ignore the 9 and the only number that is left is 2. The answer is 2.
1.9 + 3 + 4 - 7 - 2=7
15-6=9
20-5=15
16-9=7
4. Solve sums with both addition and subtraction.
e.g. 4 + 2 + 5 - 9=
5 + 4 = 9, so I can ignore the 9 and the only number that is left is 2. The answer is 2.
1.9 + 3 + 4 - 7 - 2=7
2.2 + 6 + 4 + 3 - 7=
3.4 + 5 - 9=0
5. Make a tidy number to solve change unknown problems.
77 + 6= 83
56 + 9=65
68 + 7=75
3.4 + 5 - 9=0
5. Make a tidy number to solve change unknown problems.
77 + 6= 83
56 + 9=65
68 + 7=75
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