Page 55 - Spark of math 1
P. 55
Vocabulary
tens
twenty thirty
forty fifty
sixty seventy
eighty ninety
ones tens
abacus
add sum
subtract difference
Objectives
Count by tens.
Count numbers up to 99.
Read numbers up to 99.
Count back from 99 to 0.
Use the number line to count on and back.
Add 2-digit numbers without regrouping.
Subtract 2-digit numbers without regrouping.
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