![]() ![]() Eventually, they’ll no longer need the organizer. The shapes and colors guide students through the problems until they’re comfortable with the process. But we did it without theĬalculator, which is the important point. The Shaped Multiplication and Shaped Division methods use shapes and colors to help students remember the sequence of steps. And hopefully we didn't makeĪny careless mistakes. Something that's in the 100's, we're going to Were dealing with the 10's place, we put a 0 there. Multiply the 7, which is really a 700 times 523. You don't make careless mistakes with these. We wrote the 7 down hereĪnd put the 2 up there. One right, and let's just review it a little bit. Long time and your chances of making a careless mistake are Pattern you say, hey, this'll apply to any number of digits Where I'm really going to step up the stakes. Something a little bit smaller than 58,000. But we're multiplying somethingĪ little bit smaller than 1,000 times 58, so we're getting And that sounds about rightīecause 796- it's almost 800. I'm sure I'll make aĬareless mistake at some point in this video. And notice, I've thrown inĪn extra digit up here. Now we're going to have toĭeal with that 7 right there, which is really a 70. That we don't get confused in our next step. You're putting it in the 2's place, so you still get 20. Multiply this 1, which is really a 10, times 32. This time because you always don't have all this Write 756 above 32, making sure that the ones and tens columns of both numbers line up, so that the 6 from 756 is above the 2 in 32 and the 5 in 756 is above the 3 in 32, and so on. Let's say you're going to multiply 756 and 32. So let's start off with-Īnd I'll start in yellow. Doing Standard Long Multiplication 1 Write the larger number above the smaller number. Tools to really tackle any multiplication problems. If you google Vedic math, you might find some more cool arithmetic tricks! So we have a running total of 41,690+43 = 41,733 tens so far.įinally, multiply the last digits: 3x8 = 24. ![]() So we have a running total of 4,090+79 = 4,169 hundreds so far.Ĭross multiply the last two digits by the last two digits: (2x8)+(3x9) = 16+27 = 43. So we have a running total of 350+59 = 409 thousands so far.Ĭross multiply the first three digits by the first three digits: (5x8)+(2x9)+(3x7) = 40+18+21 = 79. This represents 35 ten-thousands.Ĭross multiply the first two digits by the first two digits: (5x9)+(2x7) = 45+14 = 59. There is a Vedic math trick for multiplying any multi-digit numbers, called vertical and crosswise.įor example, let’s use this trick on the last problem in the lesson, 523 x 798. ![]()
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