Multiplying 2 Digit by 1 Digit Numbers for Kids: Split and Carry (Grade 4 Math)

Hi, I'm Luna from DoodleBeez. Today we are multiplying a two digit number by a one digit number, like twenty three times four. The secret is to split the big number into tens and ones.

Twenty three is twenty plus three. So twenty three times four is twenty times four, plus three times four. Twenty times four is eighty. Three times four is twelve.

Now add the two parts together. Eighty plus twelve is ninety two. So twenty three times four equals ninety two. Splitting into tens and ones makes big multiplying much easier.

We can also stack it in columns. Forty seven times six. Start with the ones. Six times seven is forty two. Write the two in the ones column, and carry the four tens.

Now the tens. Six times four is twenty four. Add the four we carried. Twenty four plus four is twenty eight. Write twenty eight. Forty seven times six equals two hundred eighty two.

Now it's your turn. What is thirty six times five? Pause and try. Thirty times five is one hundred fifty. Six times five is thirty. One hundred fifty plus thirty is one hundred eighty.

Great job! Remember, split the big number into tens and ones, multiply each part, then add them together. In columns, start with the ones and carry when you need to. Practice multiplying in the Math Lab at doodlebeez.com. See you next time!