ABCDEFGHIJKLMNOPQRSTU
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NA2-4: Know how many ones, tens, and hundreds are in whole numbers to at least 1000
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Write these using digits
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eg)40+3=43
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1) 10+2=
10
2) 10+9=
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3) 80+5=
12
4) 60+2=
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5) 30+3=
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Now try using hundreds
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eg)400+30+5=435
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1) 100+20+7=
20
2) 400+50+6=
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3) 100+90+1=
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4) 600+90+4=
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5) 500+10+9=
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