填空题If a is 2/5 of b, b is 1/10 of c, and c 0, then what is the value of a/c?____
填空题
If a is 2/5 of b, b is 1/10 of c, and c > 0, then what is the value of a/c?____
参考解析
解析:
我们可以用假设代入法或代数法。第一,假设法假设c = 100,因为b为c的十分之一,b= (1/10)(100) = 10,又因为a是b的五分之二,所以a = (2/5)(10) = 4。因此a/c = 4/100 = 1/25 或0.04。第二,代入法。因为a是b的五分之二,所以a = (2/5)b,又因为b为c的十分之一,所以c = 10b,因此得出下面的计算过程,故a= 1/25 或0.04。
我们可以用假设代入法或代数法。第一,假设法假设c = 100,因为b为c的十分之一,b= (1/10)(100) = 10,又因为a是b的五分之二,所以a = (2/5)(10) = 4。因此a/c = 4/100 = 1/25 或0.04。第二,代入法。因为a是b的五分之二,所以a = (2/5)b,又因为b为c的十分之一,所以c = 10b,因此得出下面的计算过程,故a= 1/25 或0.04。
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