div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentec-prod-sitess3-name-lesson-11-common-core-standards-cc3oa8-cc3oa9htmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: ec-prod-sitess3amazonawscomName Lesson 11 COMMON CORE STANDARDS CC3OA8 CC3OA9 CC3NBT1e cc3N8T2 Chapter 1 Extra Practice Find the sum Then use the Commutative loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsusreader033viewer20220527225f0cb0577e708231d436a565html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentec-prod-sitess3-name-lesson-11-common-core-standards-cc3oa8-cc3oa9htmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: ec-prod-sitess3amazonawscomName Lesson 11 COMMON CORE STANDARDS CC3OA8 CC3OA9 CC3NBT1e cc3N8T2 Chapter 1 Extra Practice Find the sum Then use the Commutative loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsusreader033viewer20220527225f0cb0577e708231d436a565html5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentec-prod-sitess3-name-lesson-11-common-core-standards-cc3oa8-cc3oa9htmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: ec-prod-sitess3amazonawscomName Lesson 11 COMMON CORE STANDARDS CC3OA8 CC3OA9 CC3NBT1e cc3N8T2 Chapter 1 Extra Practice Find the sum Then use the Commutative loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsusreader033viewer20220527225f0cb0577e708231d436a565html5thumbnails3jpg width=140 height=200 divdivdiv class=trans-pagebutton...