3rd Grade Multiplying Multiples of 10 Worksheet: 12 Column Problems

Once the times tables are solid, children can use them on bigger numbers that end in zero, like 40, 70 or 500. This 3rd grade multiplying multiples of 10 worksheet shows how. It has 12 problems written in columns, labeled a to l, with a whole number from 1 to 18 under each top number. The top number is 10, 20, 30 and so on, up to 500. A boy with a stick runs past the title, and a girl stretches in the corner. Most products stay under 1,000. A second page gives the answer key.

Use the basic fact

For 90 × 4, think of 9 tens times 4. The basic fact 9 × 4 = 36 gives 36 tens, and 36 tens is 360.

So the rule is short: multiply the digits, then write the zero. Saying "tens" out loud while your child works keeps place value in view and links the zero to a real amount. It stops the rule from turning into a trick your child cannot explain.

At the table: what goes beyond grade 3

Items a, d, f, g, i and j match the third grade goal: a one-digit number times a multiple of 10. Items b, c, e and h multiply by 10, 11 or 12. For those, the answer key writes two rows before the total.

Item e shows a first row written as "00", and a single 0 is enough there. Items k and l, 100 × 18 and 500 × 2, reach 1,800 and 1,000. Treat them as a stretch for a child who already knows the facts, since they belong to the fourth grade goals. The column multiplication format still works, with one more zero to carry along.

After the page: ten-dollar bills

Play money makes the idea concrete. Four piles of nine ten-dollar bills make 36 bills, which is 360 dollars.

Give your child a few multiples of 10 to multiply by 2, 3 or 5 out loud during a car ride or at dinner. Then compare the page with the answer key on page two. Look at where each zero lands.