Adding and subtracting Hundredth's

Transcript

Adding and subtracting Hundredth'sTo add or subtract hundredth’s, we just make them have same denominator and then compare Adding 𝟑 𝟒/𝟏𝟎 𝟕/𝟏𝟎𝟎 and 𝟑 𝟗𝟒/𝟏𝟎𝟎 These are mixed fractions, converting them into normal fractions 3 4/10 𝟕/𝟏𝟎𝟎=3+4/10+7/100=(3 × 100 + 4 × 10 + 7)/100=𝟑𝟒𝟕/𝟏𝟎𝟎 𝟑 𝟗𝟒/𝟏𝟎𝟎=(3 × 100 + 94)/100=𝟑𝟗𝟒/𝟏𝟎𝟎 Now, adding 𝟑𝟒𝟕/𝟏𝟎𝟎 and 𝟑𝟗𝟒/𝟏𝟎𝟎 Since denominator is same, we add numerator 347/100 +394/100 =(347 + 394)/100 =𝟕𝟒𝟏/𝟏𝟎𝟎 =7 41/100 =𝟕 𝟒/𝟏𝟎 𝟏/𝟏𝟎𝟎 Subtracting 𝟕 𝟏𝟖/𝟏𝟎𝟎−𝟓 𝟓/𝟏𝟎 𝟗/𝟏𝟎𝟎 These are mixed fractions, converting them into normal fractions 7 18/100=(7 × 100 +18)/10=𝟕𝟏𝟖/𝟏𝟎𝟎 5 5/10 9/100=5+5/10+9/100=(5 × 100 + 5 × 10 + 9)/100=𝟓𝟓𝟗/𝟏𝟎 Now, subtracting 𝟕𝟏𝟖/𝟏𝟎𝟎−𝟓𝟓𝟗/𝟏𝟎𝟎 Since denominator is same, we subtract numerator 𝟕𝟏𝟖/𝟏𝟎𝟎−𝟓𝟓𝟗/𝟏𝟎𝟎 =(718 − 559)/100 =𝟏𝟓𝟗/𝟏𝟎𝟎 =1 59/100 =𝟏 𝟓/𝟏𝟎 𝟗/𝟏𝟎𝟎