BSO一下我是如何教儿子数学的,举一例# WaterWorld - 未名水世界
Z*n
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mixed number 3 1/4=3+1/4
3 can be rewriten as 3/1
now 3+1/4=3/1+1/4
next, find the least common multiple of 1&4, which is 4
so 3/1 has an equivalent fraction 3/1=12/4
12/4+1/4=13/4.
Done.
Now we go back to use long division to do 13/4, we get quotient 3 with
remainder 1
.
This means 13=3x4+1
13/4=(3x4+1)/4
then we know
3 1/4=(3x4+1)/4.
3 can be rewriten as 3/1
now 3+1/4=3/1+1/4
next, find the least common multiple of 1&4, which is 4
so 3/1 has an equivalent fraction 3/1=12/4
12/4+1/4=13/4.
Done.
Now we go back to use long division to do 13/4, we get quotient 3 with
remainder 1
.
This means 13=3x4+1
13/4=(3x4+1)/4
then we know
3 1/4=(3x4+1)/4.