Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, your example is written in standard form as: 13.078
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Expressed as a decimal fraction, this is equal to 13.078.
13/60
0.078
To find the value that, when multiplied by 13, equals 78, you would divide 78 by 13. This calculation gives you the value of 6. Therefore, 6 times 13 equals 78.
78 ÷ 2 = 39