Iritana planted 5 rows with 14 lettuce in each row. How many lettuce did she plant altogether?
Strategy:Doubling & Halving.
Number sentence:5x14=
1. First I double 5 = 10.
2.Next I half 14 = 7.
Therfore the number sentence now is 10x7.
3. Last of all we multiply10 with7 = 70.
Which is the same as 5x14.
( 1.5 x 10=50
2.5 x 4`= 20
3.50+20=70)
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