#73 TIMES 50 LATTICE MULTIPLICATION HOW TO#

Here, to work out 34 x 9, the child has decided to do 34 x 10 and then take off the 34 x 1.īeyond the blank array this 'dividing the multiplication into easy parts' strategy can be formalised into the grid method. The blank array helps children to use other strategies, such as compensating, when carrying out multiplication. Here's a child using the blank array, as a thinking tool, to help them work out 15 x 14.

#73 TIMES 50 LATTICE MULTIPLICATION HOW TO#

This means that children can use their known number facts to work out calculations.Īfter a while drawing all the dots can get very tedious! The blank array then becomes a very useful tool for helping children model their thinking and work out how to do more complex multiplications in an informal way. This representation not only assists in understanding the process, but provides a visual image forĬhildren to draw upon as they begin to use and memorise the basic number facts.Īrrays can be helpfully used to explore calculations such as 13 x 5 where the array can be split into useful chunks such as 10 and 3. For example, by progressively adding another column of three objects, children can build the three-times tables for themselves. Before drilling and memorising tables, children must understand how these facts are derived.

The following array, consisting of four columns and three rows, could be used to represent the number sentence 3 x 4 = 12, 4 x 3 =12, 3 + 3 + 3 + 3 = 12 and 4 + 4 + 4 =12.Īrrays can be used for building multiplication facts in a meaningful way. Each column must contain the same number of objects as the other columns, and each row must have the same number as the other rows. Jennie Pennant, with the help of Jenni Way and Mike Askew, explores how the array can be used as a thinking tool to help children develop an in-depth understanding of multiplication and division.Īrrays are useful models for multiplication which can be used in a variety of ways, ranging from highly structured lessons to games and open investigations.Īn array is formed by arranging a set of objects into rows and columns.

73 times 50 lattice multiplication