Calculations with fractions
Columns of whole numbers, common fractions and cross-multiplications
The page is filled with arithmetic: rows of whole numbers, common fractions such as 1 2/3, 2 1/6, 13/6 and 10/3, and the crossed strokes of manual cross-multiplication. Running values like 390 and 90 are jotted toward the right. No drawing accompanies the figures.
On this page
Fraction arithmetic and cross-multiplication
Whole numbers and thirds and sixths (1 2/3, 2 1/6, 5/3, 13/6, 10/3) are set out in rows, joined by the crossed strokes of hand cross-multiplication. Partial results such as 390 and 90 are noted alongside.