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Fifth grade mathematics Huanggang small number one answer (all) thank you! Mathematics!
You go to the Internet to type the questions of this book to find out if there are any answers
A trapezoidal plot is 40 meters long at the top and 60 meters long at the bottom. The height is 40 meters (as shown in the picture). Uncle Li wants to plot the largest square plot in the plot to grow cotton, and the rest of the plots will grow peanuts. How large is the area for planting peanuts?
(40 + 60) × 40 ／ 2-40 × 40, = 100 × 40 ／ 2-1600, = 2000-1600, = 400 square meters. Answer: the area of planting peanut is 400 square meters
Xiao Wang deposits 200 yuan in the bank and Xiao Li 150 yuan. After that, Xiao Wang deposits 10 yuan and Xiao Li deposits 20 yuan every month. A few months later, they both deposit the same amount?
Suppose that two people have the same amount of deposit after x months, 200 + 10x = 150 + 20x, & nbsp; & nbsp; & nbsp; & nbsp; 50 = 10x, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 5, answer: after 5 months, two people have the same amount of deposit
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