Problem Solving Strategies1) 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 Strategies1) 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 CheckUsing Table

No of spiders

No of legs

No of dragonflies

No of legs

Total no

Of legs

Total no

Of insectsCheck

10 10 x 8 = 80 80+60=14010x6 = 6010 20 X

11 11 x 8 = 8854+88 = 1429x6=549 20 X

12 12 x 8 = 96 8x6 =488 2096+48=144 √

Problem Solving Strategies1) 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 CheckUsing Table

No of spiders

No of legs

No of dragonflies

No of legs

Total no

Of legs

Total no

Of insectsCheck

10 10 x 8 = 80 80+60=14010x6 = 6010 20 X

11 11 x 8 = 8854+88 = 1429x6=549 20 X

12 12 x 8 = 96 8x6 =488 2096+48=144 √

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 Strategies2) A florist gives away 3 stalks of roses forevery 4 bouquets of flowers sold. If she has16 bouquets of flowers to sell, how many stalks of roses does she need?

Problem Solving Strategies2) A florist gives away 3 stalks of roses forevery 4 bouquets of flowers sold. If she has16 bouquets of flowers to sell, how many stalks of roses does she need?

Find a pattern Using Table

Stalks of flowers

Bouquets of flowers

Count in 3s

Count in 4s

4

+ 4

8 12 16

3

+ 4 + 4

+ 3

6

+ 3

9

+ 3

12

Find a Pattern

1) Make a table to arrange the numbers neatly.

2) Include arrows to show the pattern.

3) Circle your answers.