Let’s say and write the differences of these squared numbers as quickly as possible.
a) $10^2 – 9^2 =$ ………………..
b) $7^2 – 5^2 =$ ………………..
c) $21^2 – 20^2 =$ ………………..
d) $50^2 – 49^2 =$ ………………..
e) $20^2 – 10^2 =$ ………………..
f) $40^2 – 30^2 =$ ………………..
1 Marks
Let’s say and write the differences of these squared numbers as quickly as possible.
a) $10^2 – 9^2 =$ ………………..
b) $7^2 – 5^2 =$ ………………..
c) $21^2 – 20^2 =$ ………………..
d) $50^2 – 49^2 =$ ………………..
e) $20^2 – 10^2 =$ ………………..
f) $40^2 – 30^2 =$ ………………..
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