3rd Grade Multiply a Two-Digit Number by One Digit worksheets

About this worksheet

Texas third graders are expected to multiply a two-digit number by a one-digit number using strategies and the standard algorithm, TEKS 3. 4(G), a skill Common Core does not name until fourth grade under 4. NBT. B. 5. That leaves a gap at third grade itself: a Texas child working on this exact skill in class could not find matching practice at their own grade level before this worksheet. Rather than teach the standard algorithm as a rule to memorize, this worksheet keeps the reasoning behind it visible. A two-digit number such as 23 is broken into 20 and 3, each part is multiplied by the one-digit number separately, and the two partial products are added back together — the distributive property at work, the same idea behind 4 x 23 equaling 4 x 20 plus 4 x 3.

A common mistake is forgetting to regroup, or carry, the extra ten that appears once the ones digit product reaches ten or more. Items rotate through partial products, the standard algorithm, the commutative property, estimation by rounding, and word problems that include and exclude regrouping. Encourage your child to multiply the ones digit first and check whether that product is ten or more before multiplying the tens.

What your child will learn

• Multiply a two-digit number by a one-digit number by breaking it into tens and ones
• Break a two-digit number into tens and ones to multiply (partial products)
• Multiply with and without regrouping
• Use the commutative property and rounding to check a product
• Solve word problems using two-digit by one-digit multiplication