24.7-1127-9271-0.125÷1884×0.25+14×16(2.5+3.6)×214+3.9×2140.875×12+0.125÷212-30%×0.2÷50%-数学
题文
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答案
①24.7-11
=24.7-(11
=24.7-20
=4
②1-0.125÷
=1-0125÷0.125, =1-1, =0; ③84×0.25+
=84×0.25+0.25×16, =0.25×(84+16), =0.25×100, =25; ④(2.5+3.6)×2
=2
=
=22.5; ⑤0.875× |