p3数学题请教

  1.   Emily has 66 markers. She has 5 more blue markers than black markers. She has 8 fewer red markers than black markers.How many red markers does she have?
2.  The total length of 3 pieces of lace A, B and C is 60 cm.A is 9 cm longer than B. C is 6cm shorter than B. What is the length of A?
想要知道过程和答案  谢谢大家

这种题用画图的办法很容易解决。两道题基本上一样。我女儿也是三年级。我让她解了一下第二题。过程如图。