_比20多20%,比30少30%的数是_.
题目
______比20多20%,比30少30%的数是______.
答案
(1)20×(1+20%),
=20×120%,
=24;
(2)30×(1-30%),
=30×70%,
=21;
故答案为:24,21.
举一反三
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