Learning addition by counting in 2s, 5s & 10s. Finding numbers in progressive sequence using the addition operation. Finding the number in between 2 given numbers. Finding the previous or subsequent even (or odd) numbers, using the addition and subtraction properties.
Mapped to CCSS Section# 2.NBT.A.2, 2.OA.C.3
Count within 1000; skip-count by 5s, 10s, and 100s.,Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.
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