Which exercises/theory should I discuss on the board?
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Slide 1: Mind map
WiskundeMiddelbare schoolvwoLeerjaar 1
This lesson contains 12 slides, with interactive quizzes and text slides.
Lesson duration is: 50 min
Items in this lesson
Which exercises/theory should I discuss on the board?
Slide 1 - Mind map
What is 5.384921 rounded to three decimal places?
A
5.38
B
5.384
C
5.385
D
5.395
Slide 2 - Quiz
5.384921 The 4th decimal is a 9, this means the 3rd decimal should increase by 1. 5.385
Slide 3 - Slide
What is 0.19523 rounded to two decimal places?
A
0.19
B
0.20
C
0.2
D
0.30
Slide 4 - Quiz
0.19523 The 3rd decimal is a 5, this means the 2nd decimal should increase by 1. Since this makes 10, the 1st decimal is increased by 1. A 0 is written in the 2nd decimal place, because you have to have two decimal places. 0.20
Slide 5 - Slide
Solve the equation. Give your answer as an approximation accurate to 2 decimal places. 10 - 3a = 15
A
132
B
−132
C
1.67
D
-1.67
Slide 6 - Quiz
Notation What you might think 10 - 3a = 15 10 + 5 = 15, so 10 - -5 = 15 3a = -5 then 3a = -5 3 x a = -5, then a = -5 : 3 -5 : 3 in my calculator gives 1.666666667, so rounded off to two decimal places is 1.67
a=−35≈1.67
Slide 7 - Slide
Solve the equation. Give an exact answer 3.5a + 8 = 9
A
0.285714286
B
1
C
3.51
D
72
Slide 8 - Quiz
Notation What you might think 3.5a + 8 = 9 9 - 8 = 1, so 1 + 8 = 9 3.5a = 1 then 3.5a = 1 3.5 x a = 1, then a = 1 : 3.5 you cannot have a fraction with a decimal number, so multiply the numerator and denominator with 2.
a=3.51=72
Slide 9 - Slide
What is the first step when making a formula from a graph?
A
shorten the formula
B
calculate the gradient
C
find the start value
D
make a table
Slide 10 - Quiz
Graph -> Formula
1) Make a table (horizontal axis top row, vertical axis bottom row) and fill in some easy to read off points on the graph (grid points). 2) Calculate the gradient (steps in the bottom row divided by the steps in the top row) 3) Find the start value (value in the bottom row when the value in the top row is 0) 4) Make a formula: start value +/- gradient x top row variable = bottom row variable
Slide 11 - Slide
Homework Monday
Make and correct all exercises from the studyplanner up to and including §10.6: 36, 37, 38, 39, 40, 41, 42