Math Unit 4. Lesson 3
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Last updated almost 5 years ago
3 questions
1
Solve using an efficient strategy.38 + 20 = 38 + 21 = 38 + 19 =
Solve using an efficient strategy.
38 + 20 =
38 + 21 =
38 + 19 =
1
Solve using an efficient strategy.47 + 40 = 47 + 41 = 47 + 39 =
Solve using an efficient strategy.
47 + 40 =
47 + 41 =
47 + 39 =
1
Solve using an efficient strategy.84 - 20 =84 - 21 =84 - 19 =
Solve using an efficient strategy.
84 - 20 =
84 - 21 =
84 - 19 =