Question
estimate 6 4/5*1 5/8
Answers
Ms. Sue
7 * 2 = 14
Probably closer to 11.
Probably closer to 11.
6 4/5 = 6 + 4 / 5 = 30 / 5 + 4 / 5 = 34 / 5
1 5/8 = 1 + 5 / 8 = 8 / 8 + 5 / 8 = 13 / 8
6 4/5 ∙ 1 5/8 = 34 / 5 ∙ 13 / 8 = 34 ∙ 13 / 5 ∙ 8 =
442 / 40 = 2 ∙ 221 / 2 ∙ 20 = 221 / 20
21 / 20 = ( 220 + 1 ) / 20 = 220 / 20 + 1 / 20 =
20 ∙ 11 / 20 + 1 / 20 = 11 + 1 / 20 = 11 1/20
6 4/5 ∙ 1 5/8 = 221 / 20 = 11 1/20
1 5/8 = 1 + 5 / 8 = 8 / 8 + 5 / 8 = 13 / 8
6 4/5 ∙ 1 5/8 = 34 / 5 ∙ 13 / 8 = 34 ∙ 13 / 5 ∙ 8 =
442 / 40 = 2 ∙ 221 / 2 ∙ 20 = 221 / 20
21 / 20 = ( 220 + 1 ) / 20 = 220 / 20 + 1 / 20 =
20 ∙ 11 / 20 + 1 / 20 = 11 + 1 / 20 = 11 1/20
6 4/5 ∙ 1 5/8 = 221 / 20 = 11 1/20
221 / 20 = ( 220 + 1 ) / 20 = 220 / 20 + 1 / 20 =
20 ∙ 11 / 20 + 1 / 20 = 11 + 1 / 20 = 11 1/20
6 4/5 ∙ 1 5/8 = 221 / 20 = 11 1/20
20 ∙ 11 / 20 + 1 / 20 = 11 + 1 / 20 = 11 1/20
6 4/5 ∙ 1 5/8 = 221 / 20 = 11 1/20
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