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The ideas in this addition lesson are taken from Add & Subtract 2-A ebook. Only a few examples of each problem type are shown; you should make more problems of each kind for the student. Fact families and basic addition facts
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Fact families with 12 |
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After finding the different sums associated with 12, and memorizing those, it is time to practice. The problems below are only showing types of exercises that a student might do; the teacher should provide more of each type of problems.
Example exercise types
1. Subtract. For each problem write a corresponding addition fact.
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12 − 5 = __ __ + __ = __ |
12 − 8 = __ __ + __ = __ |
12 − 4 = __ __ + __ = __ |
12 − 3 = __ __ + __ = __ |
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12 − 2 = __ __ + __ = __ |
12 − 6 = __ __ + __ = __ |
12 − 7 = __ __ + __ = __ |
12 − 9 = __ __ + __ = __ |
2. Find the missing addends and compare the problems. Write the corresponding problem where you only add one-digit numbers.
| 38 + __ = 42
8 + __ = 12 |
77 + __ = 82
__ + __ = 12 |
37 + __ = 42
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78 + __ = 82
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| 32 + __ = 41
__ + __ = __ |
55 + __ = 62
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26 + __ = 32
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89 + __ = 92
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Studying sums associated with 13
Color with one color as many balls as the first number shows. Color the rest some other color.
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Fact families with 13 |
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Example problem types
1. Subtract and compare the problems.
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13 − 7 = __ 23 − 7 = __ 33 − 7 = __ 43 − 7 = __ |
b.
13 − 6 = __ 23 − 6 = __ 63 − 6 = __ 93 − 6 = __ |
What do you note? Discuss with your teacher.
2. Subtract. For each problem, write a corresponding
problem where you subtract from 13.
| 23 − 9 = __
13 − 9 = 4 |
33 − 4 = __
__ − __ = __ |
73 − 7 = __
__ − __ = __ |
53 − 8 = __
__ − __ = __ |
3. Continue the patterns!
| __ − 9 = 84 __ − 9 = 74 __ − 9 = 64 __ − __ = __ __ − __ = __ __ − __ = __ __ − __ = __ |
25 + __ = 33
35 + __ = 43 45 + __ = 53 __ + __ = __ __ + __ = __ __ + __ = __ __ + __ = __ |
Studying sums associated with 14
Color with one color as many balls as the first number shows. Color the rest some other color.
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Fact families with 14 |
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Example problems
1. Find missing addends! Remember how a missing addend problem can be solved by subtraction? For each problem, write a subtraction problem using the same numbers so that the numbers in the boxes end up the same.
9 + 
= 14
14 − 9 = |
6 +
=
14
14 − 6 = |
5 +
= 14
14 − 5 = |
7 +
= 14
__ − __ = |
3. Connect with a line the problems to the answer. What do you
notice?
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39 + __
= 44 |
7
9 6 5 8 4 |
56 + __
= 64 |
The fast, FUN, and easy way to learn multiplication. Learn the upper times tales in two sittings using mnemonic stories.
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