28 17 10 28X84 A 28 easy calculation method?

Simple calculation: 28 17+28 84-28.

Simple calculation idea: If we do simple calculation, we can use the distributive property of multiplication operation or the properties and laws of associative law or division operation to calculate, and get the effect of our simple calculation. Here we can directly propose 28, and then do the calculation in parentheses, which will be easier to get the answer.

The detailed calculation process is as follows.

2800, so, you can calculate through the simple calculation process above, and the answer is 2800.

Extended information: Problem solving ideas: When calculating the vertical calculation multiplication operation, first multiply the first digit of one digit by another digit to get a one-step answer.

Then multiply the low to the high digit by another digit to get a few steps of the answer. Finally, add up all the answers you get to get the final answer.

Step 1: 1 28 = 28

Step 2: On the basis of the answer in the first step, multiply by 100 to get 2800 So, you can get the answer 2800 through the multiplication operation of vertical calculation.

The simple way to calculate this problem is the associative law of multiplication.

Using the multiplication distributive property, 28 times 17+84-1 in parentheses

Equal to 28 100.

Equal to 2800.

The simple calculation is obtained by directly extracting the common divisor 28.

28x(17+84-1)

28x100

Summarization using the distributive law of multiplication.

Original 28 (17+84-1).

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The simple algorithm is as follows.

Simple calculation of the right car calculation party to call the law:

1400, the calculation is complete. Chain bright.

28 38 14 24

28 38 Ten Thrill Lines 14 2 12

28 (38 x. 12).

Buried sail 14 2 50

Ming Bang 1400

Chiropractic seepage: 28 38+14 24=28 38+14 2 12=28 38+28 12=28 (38+12)=28 50=1400, please refer to Wang Kao, I hope it can help you Yingbi!

This problem is solved by extracting the common factor, the original formula = 14 * 76 + 14 * 24 = 14 * (76 + 24) = 14 * 100 = 1400

Using the multiplicative distributive property, 14*2*38+14*24=14*(76+24)=14*100=1400, the answer obtained is 1400

Equal to 28 38 + 14 2 12

28 (state slow 38 + 12) trembling sedan car.

Equal to 1400

The jujube method is used to calculate the rate of resistance to the key and the mu of the stool.

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Analysis: 28x25+76x28-28 can be converted into 28x25+76x28-28x1, you can see that they are all multiplied by 28, then put 28 in front of the parentheses, and then add and subtract the numbers in the parentheses.

It is calculated in a simple way as follows:

28x25+76x28-28

28x（25+76-1）

28x100

28x25 ten 76x28 a 28

II 700 X 76 28 A 28

Two 700 + 2128 a 28

II 2828-28

II 2800

28 25 76 28-28 simple arithmetic.

28 25 10 76 28 28

28 (25 x. 76-1).

28×1oo

28oo

Think of 56 26 as 28 52

So there is a 28 in front and back, and the remaining number is 52, plus 48 = 100, so the final result is 28 100 = 2800

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This Hu is as follows

28 x 42 - 1575 63 math problem elimination.

The simple operation steps of the forest bridge block are as follows:

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Summary. Hello! We're happy to answer for you! 28x142=(30-2)✘142=30✘142-2✘142=4260-284=3976

You're in good dust! Very slow to lift happy for you which macro answers! 28x142=(30-2)✘142=30✘142-2✘142=4260-284=3976

Multiplicative distributive law: adding (or subtracting) two numbers and then multiplying another number is equivalent to multiplying the remainder of this number by two additions (subtractions) respectively, and then adding (subtracting) the two products to obtain the same number. Be cautious.

216 24 with easy calculations.

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224 56 ten 456 with simple calculations.

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Roger that. Good.

224 56 ten 456 = 224 8 7 + 456 = 28 7 + 456 = 4 + 456 = 460

Roger that. Uh-huh.

I'm doing my homework, dear.

102x (86-16) with easy calculation.

102x(86-16)=102 70=(100+2) 70=100 70+2 70=7000+140=7140

There's a lot of homework, dear.

Roger that. Uh-huh.

If you do, you can continue to send it to the teacher.