30000 examples in mathematics. 1st grade: Counting up to 20, chains of examples

Mathematical examples and tasks on the basic topics studied in the 1st grade are collected in the album: addition and subtraction within 20.
Together with the child, you can count the total time spent on the decision of the column of examples of 5 chains, in each chain by 5 examples.
Solution of one chain of examples: 3 x 5 = 15 seconds.
Solution of a 5-sample column: 15 x 5 = 75 seconds.
1 minute 15 seconds - Excellent!
Solution of examples for a time is the best way to bring an account skill to automatism and achieve excellent results.
The result of mastering the material is estimated at the time spent by the child on the decision it is an arithmetic action.
An account within 10: from 3 seconds - excellent, 5 seconds - good, 7 - 9 seconds - try.
Account within 20: from 3 - 5 seconds - excellent, 5 - 7 seconds - well, 7-9 seconds - try