A few plus a few is eight

A few plus a few is eight

0+8=8
1+7=8
2+6=8
3+5=8
4+4=8
-1+9=8.

How much is 80 thousand plus 80 million?

80.8 million

What is 33 plus 33?

My

11×22+22×33+33×44+… +77×88+88×99=______ ．

11×22+22×33+33×44+… +77×88+88×99，=11×11×2+11×2×11×3+11×3×11×4+… +11 × 7 × 11 × 8 + 11 × 8 × 11 × 9, = 11 × 11 × (1 × 2 + 2 × 3 + 3 × 4 + 4 × 5 + 5 × 6 + 6 × 7 + 7 × 8 + 8 × 9), = 121 × (2 + 6 + 12 + 20 + 30 + 42 + 56 + 72), = 121 × 240, = 29040

11.22.33.44.

55,66,77,88

22× 32× 42× 52

(27-5)*(27+5)*(47-5)*(47+5)
=(27*27-25)*(47*47-25)
=704*2184
=1537536

The value of 25 × 22 × 32 × 42 × 52 is (14400)

Can I put it first
Multiply 25 and 32 to get 25 * 4 * 8 = 100 * 8
If the result is 14400, then the result of 8 * 22 * 42 * 52 is 144? Obviously not
So the value of your answer is not right

11 + 22 + 33 + 44 + 55 + * * + 99 = how to do this?

This is the summation of arithmetic sequence, the first term 11, the last term 99, the number of terms 9, the summation formula = (11 + 99) * 9 / 2 = 495, you can add 11,22,33,44,..., 9999,88,77,66,..., 11 up and down to get 110110110,..., 110, a total of nine, so you can get, 11 + 22 + 33 + 44 + 55 + * * * + 99 = (11 + 99) * 9 / 2 = 495, this is

How to calculate 3333 times 24 + 1111 times 28?

3333 by 24 + 1111 by 28
=1111*72+1111*28
=1111*(72+28)
=1111*100
=111100

Simple calculation of 1111 × 9 + 1111 × 10 + 1

=1111×(9+10)+1