Multiplication can be thought of as the first number telling how much to take of the second number. So multiplying 4 × 12 is like finding the total value of 4 groups of 12. There are 4 tens and 8 ones in total, so 4 × 12 = 48. Multiplication can also be thought of as finding the total value of a rectangle 12 units long and 4 units high. The length of 12 can be decomposed into 1 ten and 2 ones, so 4 × 12 can be thought of as (4 × 10) + (4 × 2), or 40 + 8, or 48. To find products quickly, line up the factors along their ones place, multiply the ones, multiply the tens, and then add the partial products.
Multiplying by One-digit Numbers using the Brainingcamp Base Ten Blocks virtual manipulative.
Brainingcamp virtual manipulatives can be used anywhere with no setup, cleanup, or lost parts. They are highly effective at engaging today’s digital learners and helping them bringing abstract math concepts to life.
Brainingcamp produces virtual manipulatives for iPads, Chromebooks, PCs, and Macs.