问题
解答题
120+______×8=280,△+□=200□÷△=4△=______□=______.
答案
(1)设应填x,
120+x×8=280,
120+8x-120=280-120,
8x=160,
8x÷8=160÷8,
x=20;
(2)4×△+△=200,
5△=200,
5△÷5=200÷5,
△=40,
200-40=160,
故答案为:20,40,160.
120+______×8=280,△+□=200□÷△=4△=______□=______.
(1)设应填x,
120+x×8=280,
120+8x-120=280-120,
8x=160,
8x÷8=160÷8,
x=20;
(2)4×△+△=200,
5△=200,
5△÷5=200÷5,
△=40,
200-40=160,
故答案为:20,40,160.