Download Problem Solving Strategies

Problem Solving Strategies
1) A spider has 8 legs and a dragonfly has 6 legs.
There are 20 spiders and dragonflies altogether.
There are 144 legs in all.
Find the number of spiders and the number of dragonflies.
Problem Solving Strategies
1) A spider has 8 legs and a dragonfly has 6 legs.
There are 20 spiders and dragonflies altogether.
There are 144 legs in all.
Find the number of spiders and the number of dragonflies.
Guess and Check
No of
spiders
No of legs
10
10 x 8 = 80
11
12
11 x 8 = 88
12 x 8 = 96
No of
dragonflies
10
9
8
Using Table
No of legs
10x6 = 60
9x6=54
8x6 =48
Total no
Total no
Of legs
Of insects
80+60=140
54+88 = 142
96+48=144
Check
20
X
20
20
X
√
Problem Solving Strategies
1) A spider has 8 legs and a dragonfly has 6 legs.
There are 20 spiders and dragonflies altogether.
There are 144 legs in all.
Find the number of spiders and the number of dragonflies.
Guess and Check
No of
spiders
No of legs
10
10 x 8 = 80
11
12
11 x 8 = 88
12 x 8 = 96
No of dragonflies
10
9
8
Using Table
No of legs
10x6 = 60
9x6=54
8x6 =48
Total no
Total no
Of legs
Of insects
80+60=140
54+88 = 142
96+48=144
Check
20
X
20
20
X
√
Guess and Check
1) Make a table to keep present your guesses and checks neatly.
2) Write number statements in your boxes.
3) Circle your answers.
4) Must have at least 3 guesses.
(Even though your first guess is already correct)
Problem Solving Strategies
2) A florist gives away 3 stalks of roses for
every 4 bouquets of flowers sold. If she has
16 bouquets of flowers to sell, how many stalks of roses does she need?
Problem Solving Strategies
2) A florist gives away 3 stalks of roses for
every 4 bouquets of flowers sold. If she has
16 bouquets of flowers to sell, how many stalks of roses does she need?
Find a pattern
+3
Count in 3s
Stalks of flowers
Count in 4s
Bouquets of
flowers
Using Table
+3
+3
12
3
6
9
4
8
12 16
+4
+4
+4
Find a Pattern
1) Make a table to arrange the numbers
neatly.
2) Include arrows to show the pattern.
3) Circle your answers.