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  • Make up as many expressions with numbers no variables as you can from three numbers 5, 7 and 8. Every number should be used not more than once Use only addition, subtraction and multiplication.

Q. 1.     Make up as many expressions with numbers (no variables) as you can from three numbers 5,7 and 8.  Every number should be used not more than once. Use only addition, subtraction and multiplication.(Hint: Three possible expressions are 5+(8-7),\ 5-(8-7), \ (5\times8)+7 make the other expressions.)

Answers (1)

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The  other expressions are :

(i)(8\times 5)-7

(ii)(8+5)-7

(iii)(8+7)-5

(iv)(8\times 7)-5

(v) 5\times (7+8)

(vi) 5\times (7\times 8)

(vii) 5-(7+ 8)

(viii) 5+(8-7)

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mansi

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