Maths Vocabulary Review - Do you know all these words?

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1.
inverseoperations
2.
expandedform
3.
sum
4.
difference
5.
plus
6.
minus
7.
addition
8.
subtraction
9.
multiplication
10.
addition
11.
table
12.
column
13.
row
14.
hundreds
15.
thousands
16.
regrouping
17.
placevalue
18.
greaterthan
19.
lessthan
20.
equal
21.
estimate