find the value of:2/5+3/8-1/4
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Answer:
21/ 40
= 0.525
Step-by-step explanation:
2/ 5 + 3/ 8 = 2 · 8/ 5 · 8 + 3 · 5/ 8 · 5 = 16/ 40 + 15/ 40 = 16 + 15/ 40 = 31/ 40
the result of step No. 1 - 1/ 4 = 31/ 40 - 1/ 4 = 31/ 40 - 1 · 10/ 4 · 10 = 31/ 40 - 10/ 40 =31 - 10/ 40 = 21/ 40
Answered by
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2×8+3×5/40-1/4
16+15/40-1/4
31-10/40
21/40
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