Cálculo mental 5
Authored by Oscar Rodrigues
Mathematics
5th Grade
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8 questions
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1.
FILL IN THE BLANK QUESTION
30 sec • 5 pts
Answer explanation
Estratégia a usar.
4 x 25 =
= 100
2.
FILL IN THE BLANK QUESTION
30 sec • 5 pts
Answer explanation
Estratégia a usar.
2 x 50 =
= 100
3.
FILL IN THE BLANK QUESTION
30 sec • 5 pts
Answer explanation
Estratégia a usar.
5 x 18 x 2 =
= 5 x 2 x 18 =
= 10 x 18 =
= 180
4.
FILL IN THE BLANK QUESTION
30 sec • 5 pts
Answer explanation
Estratégia a usar.
5 x 45 x 2 =
= 5 x 2 x 45 =
= 10 x 45 =
= 450
5.
FILL IN THE BLANK QUESTION
30 sec • 5 pts
Answer explanation
Estratégia a usar.
50 x 2 x 70 =
= 50 x 2 x 70 =
= 100 x 70 =
= 7000
6.
FILL IN THE BLANK QUESTION
30 sec • 5 pts
Answer explanation
Estratégia a usar.
50 x 82 x 2 =
= 50 x 2 x 82 =
= 100 x 82 =
= 8200
7.
FILL IN THE BLANK QUESTION
30 sec • 5 pts
Answer explanation
Estratégia a usar.
25 x 78 x 4 =
= 25 x 4 x 78 =
= 100 x 78 =
= 7800
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