Math is a difficult subject to differentiate. If you choose to teach at home, you may put her in a situation where you're forced to accelerate. Multiplication tables are 3rd/4th grade material. 5th grade is longer calculations and fractions. 6th grade introduces ration and proportion, 7th and 8th grade are pre algebra and pre-geometry. Math can force you into an uncomfortable situation!
At 5 years old, my son was doing math about the same level as your daughter. He begged to "do workbook" and I obliged. In 2nd grade I moved him to a public virtual charter school that does continuous progress acceleration for all students. Now he's 4th grade, homeschooled, and doing Algebra 2. Now what?! I can't put him back into public school until 6th grade (when middle school does subject acceleration), unless I grade skip him (no thanks). I can't teach him pre-calc or stats - I haven't taken them. I'm looking at not teaching him math, which is technically in violation of state homeschool requirements, or sending him to the community college for math class (which costs less than a semester of tutoring).
Math K - 4 is mainly memorizing facts. A child can get WILDLY accelerated by teaching elementary math at home. Please consider the possible consequences. If she is otherwise happy in school, I recommend taking a close look at if doing math at home is a good idea.
