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MULTI-DIGIT MULTIPLICATION

Multiply larger numbers using the grid method and column multiplication.

L5L6

CS.N.4.2·Performing calculations with large natural numbers(IV)CS.N.4.4·Using multiplication properties to simplify calculations(IV)

Section 1 / 3

THE GRID (BOX) METHOD

Split each number into tens and ones, draw a grid, and multiply each pair. For 23 x 4: make boxes for 20 x 4 = 80 and 3 x 4 = 12. Add: 80 + 12 = 92.

23 x 4

1Break apart: 20 x 4 = 80

23 x 4 = 12

380 + 12 = 92

= 92

LEADER TIP

The grid (box) method is an excellent bridge between understanding and the standard algorithm. Don't skip it!

BEFORE THIS LESSON, TRY

PRACTICE WITH THESE GAMES

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