作者：Amy Boljkovac 11 年以前
459
Addition Progression
The text provided outlines various strategies and examples for teaching and practicing addition with sums less than 100. It includes adding two-digit numbers, both with and without crossing into the next decade, and adding one-digit numbers to two-digit numbers.
開啟
Followed By:
Sums of Numbers Less
Than 100 Adding any 2-digit number with any other
2-digit number with sums less than 100. Ex: 34+58, 67+ 25 Adding a 2-digit teen number with any other
2-digit number Ex: 36+15, 49+14 Adding a 2-digit and a 1-digit number Ex: 74+9, 73+8, 54+7 Adding 2-digit numbers with sums below 100(not crossing over into the next decade) Ex: 34+12, 48+11, 56+13 Partners to 100 Multiples of 10
(10+90, 70+30, etc) 2-digit numbers
(11+89, 65+35, etc) Adding a multiplie of 10 to a 2-digit number
with a sum less than 100 Ex: 53+30, 24+70, 40+39 Adding multiples of 10 with sums less than
100 Ex: 50+30, 20+40 Adding 10 to any two digit number Ex: 43+10, 10+57, 34+__=44 Adding 10 to any two digit number (multiple
of 10) Ex: 40+10, 30+10, 50+__=60. Early Addition Progression
(as laid out by the ASD-E Numeracy Team) Counting on from multiples of 10 Ex: 20+6, 4+30, 20+__=24 Basic facts with sums less than 20 Ex: 7+8, 6+6 Basic facts with sums less than 10 Ex: 3+5, 4+3 Partners to 20 Ex: 17+3, 18+2 Working with 10 Partners to 10
(1+9, 2+8, 3+7, 4+6, 5+5, and reversals) Counting on from 10
(10+1, 10+2, 10+3, etc.) Working with 5 Partners to 5
(4+1, 3+2, 2+3, 1+4) Counting on from 5
(5+1, 5+2, 5+3, 5+4, 5+5)
