Answer Key PETS 3 3 Match and write. four four 1 + 7 1 1 1 + 7 ten ten 2 2 9 - 8 9 - 8 one one 3 3 4 - 2 4 - 2 nine nine 4 4 2 x 22 x 2 two two 5 5 6 + 36 + 3 eight eight 6 6 2 x 5 birds 2 x 5 141