There is an "arithmetic reasoning" subtest for the WISC IV, but it often isn't used with the usual battery.
Getting my son tested not only helped me realized the reaches of his giftedness a little better, it also clued us in on his learning differences and difficulties.
My son seemed normal, except for a couple of flukish things regarding his handwriting and vocabulary. The WISC IV showed us he was very intelligent, but also that he had severe difficulties in working memory, processing speed and perceptual reasoning.
