Constant Difference

Fill in the Blanks

Fill in the blank. Anna was born in 1997. How old was she in 2012?

years old

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Fill in the blank. Craig was born in 1992. How old was he in 2007?

years old

Fill in the Blanks

Fill in the blank. Peter was born in 1947. How old was he in 2000?

years old

Fill in the Blanks

Fill in the blank. Peter was born in 1947. Peter's wife, Sasha, was born in 1949. Is she older or younger than Peter? How old was she in 2000?

years old

Fill in the Blanks

Fill in the blank. Emma was born in 1963. How old was she in 2002?

years old

Multiple Choice

Fill in the blank. Emma's husband, Tom, was born in 1961. Is he older or younger than Emma?

• older

• younger

Fill in the Blanks

Fill in the blank. Emma's husband, Tom, was born in 1961. How old was he in 2002?

years old

Fill in the Blanks

Fill in the blank. If the telephone was invented in 1876, how "old" was it in 1991? (How long had it been around?)

years

Fill in the Blanks

Fill in the blank. If the stethoscope was invented in 1819, how old was it in 1997?

years

Fill in the Blanks

Fill in the blank. If the battery was invented in 1799, how old was it in 1998?

years