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 \times 8)+7 $; make the other expressions.)

To do:

We have to make up as many expressions with numbers (no variables) as we can from three numbers 5,7 and 8.

Solution:

Some of the expressions formed by 5, 7 and 8 are as follows:

$5+(8-7)$

$5-(8-7)$

$5-(8+7)$

$(5 \times 8)+7$

$(5 \times8) - 7)$

$5 \times (8 + 7)$

$(7 + 5) \times 8$

$(8 – 5) \times 7$

$(8 + 5) \times 7$

$(7 – 5) \times 8$

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Updated on: 10-Oct-2022

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