1-25%= 1+75%= 15%+8%=
150%-1= 1-9%= 1+45%=
分析:把1看做100%,百分?jǐn)?shù)相加減時(shí),分母不變,即百分號(hào)不變,把分子相加減即可算出得數(shù).
解答:解:
1-25%=75% 1+75%=175% 15%+8%=23%
150%-1=50% 1-9%=91% 1+45%=145%
點(diǎn)評(píng):本題考查百分?jǐn)?shù)的加減法,分母不變,即百分號(hào)不變,把分子相加減.
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