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primary 5 | Maths
| Whole Numbers
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Date Posted: 2 years ago
Views: 359
C+D = 2×80 ①
E+D = 2×75 ②
E+F = 2×77 ③
① + ② + ③ ⇨
(C+F)+2(D+E) = 2×(80+75+77)
C+F = 2×(80+77-75) = 164
(C+F)/2 = 164 ÷ 2 = 82 (Ans)
E+D = 2×75 ②
E+F = 2×77 ③
① + ② + ③ ⇨
(C+F)+2(D+E) = 2×(80+75+77)
C+F = 2×(80+77-75) = 164
(C+F)/2 = 164 ÷ 2 = 82 (Ans)
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