Question 1(d) :
Sove:
57+13
57, 13 are unlike fractions because their denominators are different.
The LCM of the denominators of the given fractions i.e. the L.C.M. of 7 and 3 is 21.
∴ 57+13=5×3+7×121=15+721=2221=1121
Question 1(d)
Determine if the following are in proportion:
32, 48, 70, 210
Question 81 (ii)
Simplify: 65×37−15×37.