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Littered Trash => Nothing To See Here => Topic started by: Admin on January 23, 2016, 07:15:00 PM

Title: COMMON CORE…. Real life Grade 2, Math Example….
Post by: Admin on January 23, 2016, 07:15:00 PM

Quote

--Grade 2 addition problem:

“Solve using your place value chart and number disks, composing a 10 when necessary: 53 + 19.”

Old way
+53
+19
=72

Operation 1) 3=9=12
Operation 2) leave the 2, carry the 1
Operation 3) 1+5+1=7


**********
COMMON CORE Solution:

53 + 19

Draw and label Tens disks
: (10) (10) (10) (10) (10) :

Draw and label Ones disks
: (1) (1) (1) :

Draw and label Tens Disks
: (10) :

Draw and label Ones disks
: (1) (1) (1) (1) (1) (1) (1) (1) (1

Add Ones disks (count)
: (1) (1) (1) (1) (1) (1) (1) (1) (1) + (1) (1) (1) :
= 12

Add Tens disks (count)
: (10) (10) (10) (10) (10) + (10) :
= 60

60+12=72

I did it!