Current location - Training Enrollment Network - Mathematics courses - Solving the slightly complicated percentage problem with the sixth grade mathematical equation.
Solving the slightly complicated percentage problem with the sixth grade mathematical equation.
1. The canteen used 1.6 tons of coal in February, saving 20% compared with 1 month. How many tons of coal are used in January?

Equivalence relation: 1 monthly coal consumption× (1-20%) = February coal consumption.

Equation: x × (1-20%) = 1.6.

x = 1.6 \80 %

X=2

Train speed 106 km, 35% faster than cars. How many kilometers does this car travel per hour?

Equivalence relation: car speed × (1+35%) = train speed.

Equation:

X×( 1+35%)= 106

x = 106 \ 135%

X=78.5