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Beginner
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Grade 2 · Autumn
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Addition and subtraction within 100 (II)
Addition and subtraction within 100 (II)
3 Knowledge points
Estimated time · 23 min
0%
01
Adding two-digit numbers in columns
Align places, carry at ten
8 min
Continue
02
Subtracting two-digit numbers in columns
Borrow one ten when short
8 min
Continue
03
How many more or fewer
Find the base, then choose + or −
7 min
Continue