Math - Grade 1 (2) - Addition 1

Pre: Math - Grade 1 (1) - Identify shapes 1

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Unit 2. Addition 1

1.1 Add tens

a. Level 1

10 + 40 =	30 + 10 =
20 + 20 =	40 + 30 =
40 + 40 =	20 + 30 =
20 + 50 =	40 + 20 =
10 + 30 =	30 + 30 =

b. Level 2

40 + 50 =	30 + 50 =
80 + 10 =	70 + 20 =
50 + 40 =	60 + 30 =
50 + 50 =	80 + 20 =
30 + 30 =	90 + 10 =

c. Level 3

50 + 5 =	30 + 6 =
80 + 9 =	8 + 20 =
22 + 40 =	16 + 30 =
10 + 59 =	80 + 11 =
3 + 30 =	19 + 10 =

d. Level 4

15 + 70 =	3 + 60 =
78 + 10 =	8 + 20 =
36 + 60 =	16 + 30 =
15 + 80 =	90 + 7 =
70 + 30 =	50 + 47 =

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