27 + 51 28 + 50 = 78
a. 41 + 16
b. 79 + 14
c. 580 + 355
d. 174 + 620
e. 378...
English, 02.03.2021 05:20 issaaamiaaa15
27 + 51 28 + 50 = 78
a. 41 + 16
b. 79 + 14
c. 580 + 355
d. 174 + 620
e. 378 + 210
2. Use the mental math strategy of expanding (splitting into place values) to add the following
numbers. Write down how you would change the numbers in your head for each question.
Ex. 53 + 28 �� + �
�� + �
�� + �� = ��
a. 14 + 43
b. 38 + 48
c. 147 + 312
d. 655 + 343
Answers: 1
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