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Algebra - Introduction and Notation

  a - answer    s - solution    v - video

Question 1


What is the missing number in the boxes?

a) $\square+1=2$  a s v
b) $\square+5=7$  a s v
c) $\square-3=5$  a s v
d) $\square\times4=12$  a s v
e) $\square\div2=7$  a s v
f) $18+\square=50$  a s v
g) $20-\square=9$  a s v
h) $\square\times8=88$  a s v
i) $5+8=\square$  a s v
j) $20\times3=\square$  a s v
k) $18\div3=\square$  a s v
l) $8-\square+4=9$  a s v
m) $6+4=\square\times2$  a s v


Question 2


What is the missing number in the boxes?

a) There are $\square$ days in a week  a s v

b) Eighty divided by 4 is $\square$  a s v

c) A pentagon has $\square$ sides  a s v

d) This week I ate an apple on Monday, Wednesday and Saturday. I ate $\square$ apples this week.  a s v

e) The freezing point of water is $\square^\circ$C.  a s v

f) I muliply 5 by 8, add 20 and then divide this by 4. The answer is $\square$.  a s v

g) There are $\square$ days in a week  a s v



Question 3


Each letter represents a number. Find the value of the letter.

a) ${\bf r}+5=9$  a s v
b) ${\bf a}+12=19$  a s v
c) ${\bf h}\times8=72$  a s v
d) ${\bf q}-17=25$  a s v
e) ${\bf x}\div 18=2$  a s v
f) $74+{\bf s}=100$  a s v
g) $150-{\bf g}=50$  a s v
h) $600\div{\bf y}=4$  a s v
i) ${\bf b}+15-25=67$  a s v
j) ${\bf m}+{\bf m}=66$  a s v
k) ${\bf k}\times{\bf k}=100$  a s v
l) $6\times{\bf z}+-16=20$  a s v
m) ${\bf w}\times7=24-{\bf w}$  a s v


Question 4


Write each expression without the mutliplication sign

a) $2\times{\bf x}$  a s v
b) $5\times{\bf y}$  a s v
c) ${\bf h}\times3$  a s v
d) ${\bf w}\times18$  a s v
e) $5\times{\bf t}+8$  a s v
f) ${\bf u}\times6-3$  a s v
g) $2\times3\times{\bf g}$  a s v
h) $4\times{\bf k}\times5$  a s v
i) ${\bf e}\times{\bf k}$  a s v
j) ${\bf d}\times{\bf c}\times{\bf a}$  a s v
k) $9\times{\bf w}\times{\bf z}$  a s v
l) $2\times{\bf f}\times{\bf h}\times5\times{\bf g}$  a s v


Question 5


Write each expression without the division sign

a) ${\bf e}\div3$  a s v
b) ${\bf x}\div4$  a s v
c) ${\bf c}\div20$  a s v
d) $t\div{\bf b}$  a s v
e) $2\div{\bf b}$  a s v
f) $16\div{\bf n}$  a s v
g) ${\bf x}\div{\bf y}$  a s v
h) ${\bf st}\div{\bf r}$  a s v
i) ${\bf 6}\div{\bf x}+5$  a s v
j) ${\bf t}\div{\bf e}+{\bf 19}\div{\bf h}$  a s v


Question 6


Write each expression without the multiplication signs

a) ${\bf x}\times{\bf x}$  a s v
b) ${\bf g}\times{\bf g}\times{\bf g}$  a s v
c) ${\bf w}\times{\bf w}\times{\bf w}\times{\bf w}\times{\bf w}$  a s v
d) $9\times{\bf d}\times{\bf d}$  a s v
e) $20{\bf y}\times{\bf y}\times{\bf y}$  a s v
f) $5\times{\bf a}\times2\times{\bf a}$  a s v
g) $9\times{\bf h}\times{\bf h}\times{\bf h}\times3\times{\bf h}$  a s v