Mass = density * volume, let the volume of a raw material be X, and density is the density of this raw material.
Solution: According to the proportion, the dosage can be obtained directly through mathematical operation.
1, the ratio is the ratio of two doses, and the total volume is multiplied by the ratio of each substance to get the dose.
2. The ratio of cement stone to sand is 1 6.3, and the ratio of cement stone is1/7.3; The proportion of sand is 6.3/7.3.
3. So: one cubic meter needs cement stone:/kloc-0 /× (1/7.3) = 0.14 cubic meter; One cubic meter needs sand: 1×(6.3/7.3)=0.86 cubic meter.
Extended data
The meaning of multiplication:
1. Multiplication principle: If the dependent variable f is directly proportional to the independent variable X 1, X2, X3...Xn, and each independent variable is qualitatively different, if any independent variable f is missing, it will lose its meaning, then it is multiplication.
In probability theory, the result of an event needs to be divided into n steps, the first step 1 includes M 1 different results, the second step includes M2 different results, …, and the n step includes Mn different results. Then this event may have n = m 1× m2× m3×…× Mn different results.
2. addition principle: If the dependent variable F and the independent variable (z 1, z2, z3…,? Zn) is directly proportional to each other, and each independent variable has the same mass. If the dependent variable f still makes sense without any independent variables, it is addition.
In probability theory, if an event has n kinds of results, the first 1 result includes M 1 different results, the second result includes M2 different results, ... and these n kinds of results include Mn different results, then this event may have n = M 1+M2+M3+...+Mn different.
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