Learn the steps needed to multiply a number by a two-digit number.
1. How to Multiply by Double Digits 4 5 Step 1 Multiply the ones on the bottom by the ones on the top x 3 6 6 ones x 5 ones = 30 ones 30 ones = 3 tens and 0 ones 3 4 5 Step 2 Put the ones in the ones place and regroup the tens x 3 6 above the tens place 0 3 Step 3 Multiply the bottom ones by the top tens 4 5 6 ones x 4 tens = 24 tens x 3 6 2 7 0 Step 4 Add the tens you regrouped in step 2 24 tens + 3 tens = 27 tens Step 5 Write down the answer to step 4 next to the ones 3 4 5 Step 6 You now will be multiplying with the tens column x 3 6 Write a 0 in the ones column 2 7 0 0 3 4 5 Step 7 Multiply the tens on the bottom by the ones on the top x 3 6 3 tens x 5 ones = 15 tens 2 7 0 15 tens = 1 hundred and 5 tens 0 1 3 4 5 Step 8 Put the tens next to the 0 from step 6 and regroup the x 3 6 hundreds by placing them above the tens column 2 7 0 5 0
2. 1 3 4 5 Step 9 Multiply the tens on the bottom by the tens on the top x 3 6 3 tens x 4 tens = 12 hundreds 2 7 0 5 0 Step 10 Add the regrouped amount from step 8 12 hundreds + 1 hundred = 13 hundreds 1 3 4 5 Step 11 Write down the answer to step 10 x 3 6 2 7 0 1 3 5 0 1 3 4 5 Step 12 Add the two numbers x 3 6 0 ones + 0 ones = 0 ones 1 2 7 0 + 1 3 5 0 7 tens + 5 tens = 12 tens 1 6 2 0 12 tens = 1 hundred and 2 tens Write the 2 in the tens place and regroup the 1 hundred 1 hundred + 2 hundreds + 3 hundreds = 6 hundreds 0 thousands + 1 thousand = 1 thousand
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