Using the any–order property
Question 1
Carry out these additions mentally.
a | |||
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b | |||
c | |||
d | |||
e |
Question 2
Carry out the following additions mentally.
a | |||
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b | |||
c | |||
d |
Carry out these additions mentally.
a | |||
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b | |||
c | |||
d | |||
e |
Carry out the following additions mentally.
a | |||
---|---|---|---|
b | |||
c | |||
d |