1-digit by 4-digit Multiplication

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Presentation transcript:

1-digit by 4-digit Multiplication

1-digit x 4-digit Multiplication THINK! Can we apply the same methods we used when we multiplied a 1-digit by 2-digit and 1-digit by 3-digit number to a 1 digit by 4-digit multiplication problem??

1-digit x 4-digit Multiplication Remember: For every PLACE VALUE added in the number you ADD an area or a rectangle 6 X 23 7 X 233 8 X 6, 345 What patterns do you notice?

2-digit by 2-digit Multiplication

2 x 2-Digit Multiplication

2-digit by 2-digit Multiplication

43 x 27 = ? Expand the numbers by place values Draw a rectangle and label the dimensions Find the “area” of each rectangle by multiplying the dimensions Then add the partial products 20 7 800 280 60 21 40 3 40 x 7 = 280 40 x 20 = 800 ? + 3 x 7 = 21 3 x 20 = 60 1,161

Your Turn! Practice this problem on your own… 45 X 62