Question

Multiply.(i) 7/5 × 1/4 (ii) 6/7 × 2/5 (iii) 5/9 × 4/9 (iv) 4/11 × 2/7(v) 1/5 × 7/2 (vi) 9/7 × 7/8 (vii) 5/6 × 6/5 (viii) 617 × 3/2

Answer 1

i) 7/20
ii) 12/35
iii) 20/81
iv) 8/77
v) 7/10
vi) 9/8
vii) 1
viii) 925/2

Answer 2

Answer:

$\rm (i): \dfrac {7}{20}\\(ii): \dfrac {12}{35}\\(iii): \dfrac {20}{81}\\(iv): \dfrac {8}{77}\\(v): \dfrac {7}{10}\\(vi): \dfrac {9}{8}\\(vii): 1\\(viii): \dfrac {1851}{2}$

Step-by-step explanation:

Part (i):

$\dfrac 75 \times \dfrac 14=\dfrac{7\times 1}{5\times 4}=\dfrac{7}{20}.$

Part (ii):

$\dfrac 67 \times \dfrac 25=\dfrac{6\times 2}{7\times 5}=\dfrac{12}{35}.$

Part (iii):

$\dfrac 59 \times \dfrac 49=\dfrac{5\times 4}{9\times 9}=\dfrac{20}{81}.$

Part (iv):

$\dfrac 4{11} \times \dfrac 27=\dfrac{4\times 2}{11\times 7}=\dfrac{8}{77}.$

Part (v):

$\dfrac 15 \times \dfrac 72=\dfrac{1\times 7}{5\times 2}=\dfrac{7}{10}.$

Part (vi):

$\dfrac 97 \times \dfrac 78=\dfrac{9\times 7}{7\times 8}=\dfrac{63}{56} =\dfrac 98.$

Part (vii):

$\dfrac 56 \times \dfrac 65=\dfrac{5\times 6}{6\times 5}=\dfrac{30}{30}=1.$

Part (viii):

$617\times \dfrac 32=\dfrac{617}{1}\times \dfrac 32=\dfrac{617\times 3}{1\times 2}=\dfrac{1851}{2}.$