This week we have been learning about Add and subtract using compatible numbers here is some working I have done using this strategy!Here is a the strategy we have been learning to do.
Here is what i have manged to do by using this strategy.
(Wednesday)
a) 7 + 3 + 4 + 3 + 7 - 10 -10 = 4
b) 1 + 5 + 2 + 4 + 8 + 4 - 9 - 7 = 8
c) 7 + 18 + 9 + 2 + 3 - 12 - 20 = 7
d) 28 + 12 + 5 - 40 = 5
e) 24 + 16 + 4 + 3 + 5 - 7 - 40= 5
f) 12 + 15 + 8 + 6 + 7 - 20 - 21 = 7
(Thursday)
a) 7 + 3 + 4 + 3 + 7 - 10 -10 = 4
b) 1 + 5 + 2 + 4 + 8 + 4 - 9 - 7 = 8
c) 7 + 18 + 9 + 2 + 3 - 12 - 20 = 7
d) 28 + 12 + 5 - 40 = 5
e) 24 + 16 + 4 + 3 + 5 - 7 - 40= 5
f) 12 + 15 + 8 + 6 + 7 - 20 - 21 = 7