maths- year 7, book 1
BIDMAS
bracket, indecies, division, multiplication, subtraction
TRUNKATION
is where you ignore all the numbers after the DP you need. for example 3.1415989764685 trunkated to 3DP would be 3.1415
TRY THESE QUESTIONS THAT YOU GOT WRONG
YEAR 7 AUTUMN TERM ASSESSMENT- 87%
work out—— (-3) + (-8)
work out———— 64.5 / 0.15
work out———-(-8) x 5
work out————- 3.6/ 0.4
ANSWERS
-11
430
-40
9
YEAR 7 SPRING TERM ASSESSMENT- 82%
write 280 as a product of its prime factors
work out—— 3/5 × 7/2
ANSWERS
2×2×2×2×5×7
2 1/10
^ = A + B, the numbers are in both
for example if the question was:
A= 2, 3, 5, , 7, 8
B= 1,3,4 ,5 ,8, 9
list the elements of A*upisdown u* B
answer= 3, 5, 8
^ universal set symbol
for example if the question was:
universal set symbol = 1,2,3,4,5,6,7,8,9,10
A= 2,3,5,7
the complement of A= 1,4,6,8,9,10
^^^
complement- everything that is not in the other thing
the symbol for complement = ‘ so
the complement of A = A’
^
U= in A or B or both
for example if the question was:
A= 2,3,5,7,8,11
B= 1,3,4,5,8,9,12
list the numbers in A U B
the answer would be- 2,3,5,7,8,11,1,3,4,5,8,9,12
P can mean ‘probability’
STANDARD FORM
10^4- 10,000
10³- 1,000
10²-100
10^1- 10
10^0- 1
10^-1 - 0.1
10^-2- 0.01