# Test: Algebraic expressions II - Normal

Double click on maths expressions to zoom
Question 1:   Multiply  $\frac{2}{5}×10a$
$25a$
$4a$
$20a$
$a$
Question 2:   Divide the fractions  $\frac{a}{2}:\frac{{a}^{2}}{6}$
$\frac{a}{3}$
$\frac{3}{a}$
$3a$
$\frac{{a}^{3}}{12}$
Question 3:   Expand the brackets  $\left(a+0.3\right)5b$
$5ab+1.5b$
$5ab+0.3$
$5ab+15b$
$a+1.5b$
Question 4:   Subtract  $18m6cm-3m7cm$
$14m99cm$
$14m$
$14m1cm$
$15m1cm$
Question 5:   Factorise  $25-{a}^{2}$
$\left(20-a\right)\left(5-a\right)$
$\left(5-a\right)\left(5+a\right)$
$\left(20-a\right)\left(5+a\right)$
$\left(10-a\right)\left(10+a\right)$
Question 6:   Multiply  $0.25{a}^{3}{b}^{2}×4a$
$10ab$
$100{a}^{4}{b}^{2}$
 $10a$
${a}^{4}{b}^{2}$
Question 7:   Simplify the expression  $\sqrt{16a}-\sqrt{81a}+3\sqrt{a}$
$2$
$-2\sqrt{a}$
$-\sqrt{62a}$
$2\sqrt{a}$
Question 8:   Calculate  $7a+\sqrt{2a}$ , when  $a=2$:
$9\sqrt{2}$
$16$
$16\sqrt{2}$
$9$
Question 9:   Simplify the expression  $0.4\left(a-2\right)+0.8$
$0.4a$
$0.8a$
$0.8$
$0.4$
Question 10:   Simplify:  $\frac{10y-5}{5y}$
$\frac{y-1}{y}$
$5y$
$10y$
$\frac{2y-1}{y}$