how can i use skip-counting to solve problems? sara’s packing 8 goodie bags with 5 pieces of candy...
TRANSCRIPT
How can I use skip-counting to solve problems?
Sara’s packing 8 goodie bags with 5 pieces of candy each for a class party. How many pieces of candy does she need?
Let’s Review
-10 -10 -10 -10
+10 +10 +10 +10
Skip-count forward – repeated addition.
738, 748, 758, 768, 778
Skip-count backwards – repeated subtraction.
778, 768, 758, 748, 738
A Common Misunderstanding
Thinking skip-counting is fun, but forgetting to use it to solve problems.
5, 10, 15, 20
1. 14, 24, ___, 44, ___2. 100, 95, 90, ___, ___3. 2, __, 6, 8, ___
Marcus has $103 saved up and his grandmother gives him $10 each week. How much will he have in 5 weeks?
counting objects missing number puzzles
word problems
Core Lesson
Sara’s packing 8 party bags with 5 pieces of candy each. How many pieces of candy does she need?
5 5 5 5 5
5 5 55 + 5 + 5 + 5 + 5 + 5 + 5 + 5
= 40Sara needs 40 pieces of candy.
5 pieces = 1 bag
? pieces = 8 bags
Core Lesson
Marcus has $103 saved up and his grandmother gives him $10 each week. How much will he have in 5 weeks?
$103
+ $10 + $10 + $10 + $10 + $10 =
?
$103
+ $10 week 1
$113
+ $10 week 2
$123
+ $10 week 3
$133
+ $10 week 4
$143
+ $10 week 5
$153
$153
Core Lesson
Sara’s packing party bags with 5 pieces of candy each. She used 55 pieces of candy. How many bags did she pack?
5 10 15 20 25
30 35 40 45 50
55
Sara packed 11 bags.
Core Lesson
Latasha’s dad was baking cookies for her on Sunday. Each tray holds 10 cookies. He baked 50 cookies altogether. How many trays of cookies did Latasha’s dad bake?
? trays = 50 cookies
Latasha’s dad baked 5 trays of
cookies.
10
20 30 40 50
tray 1 tray 2 tray 3 tray 4 tray 5
1 tray = 10 cookies
Core Lesson
Sara’s packing 8 party bags with 5 pieces of candy each. How many pieces of candy does she need?
Marcus has $103 saved up and his grandmother gives him $10 each week. How much will he have in 5 weeks?
Latasha’s dad was baking cookies for her on Sunday. Each tray holds 10 cookies. He baked 50 cookies altogether. How many trays of cookies did Latasha’s dad bake?
You can use skip-counting to solve all
kinds of problems!