Simple calculation of 1996 × 2345-2346 × 1995

Simple calculation of 1996 × 2345-2346 × 1995

1996×2345-2346×1995
=（1995+1）x2345-(2345+1)x1995
=1995x2345+2345-2345x1995-1995
=2345-1995
=350

Simple operation of 1234 + 2345 + 3456 + 4567 + 5678 + 6789 + 7891 + 8912 + 9123

From the formula, we can see that each order is 1 added to 9, and the total is 45, that is to say, there are 45 1000, 45 100, 45 10, 45 11234 + 2345 + 3456 + 4567 + 5678 + 6789 + 7891 + 8912 + 9123 = (1 + 2 +... + 9) * 1000 + (2 +... + 9 + 1) * 100 + (3 +. + 9 + 1 + 2) * 10 + (4 +. + 9 + 1 + 2 + 3) = 45

Simple calculation: 55 × 66 + 66x77 + 77x88 + 88x99
Don't use * and /, use △ and × symbols, and list them in the equation

55×66+66x77+77x88+88x99
=11×5×11×6+11×6×11×7+11×7×11×8+11×8×11×9
=11×11×(5×6+6×7+7×8+8×9)
=121×(30+42+56+72)
=121×200
=24200

(6.8-6.8 * 0.55) / 8.5 simple calculation

(6.8-6.8*0.55)/8.5
=6.8x(1-0.55)÷8.5
=6.8x0.45x2/17
=0.4x0.9
=0.36

Can 4.8 * 0.55 / 0.5 be easily calculated?

4.8*0.55/0.5
=4.8*0.11
=4.8*(0.1+0.01)
=4.8*0.1+4.8*0.01
=0.48+0.048
=0.528

55 * (5 + 8) simple operation

55*（5+8）=(50+5)*13=50*13+5*13=650+65=715

The simple calculation of 999 + 999 times 999

=999×(1+999)=999×1000=999000

999 parts per 1000 times 1 parts per 100 plus 111 parts per 1000 times 27 parts per 100

999/1000x1/100+111/1000x27/100
=999/1000x1/100+111/1000x9x3/100
=999/1000x(1/100+3/100)
=999/1000x1/25
=999/25000
If you don't understand this question, you can ask,

Simple calculation: 1 / 2 + 1 / 4 + 1 / 8 + 1 / 16 + 1 / 32 + 1 / 64 + 1 / 128 =?

1/2+1/4+1/8+1/16+1/32+1/64+1/128 =3/4+1/8+1/16+1/32+1/64+1/128 =7/8+1/16+1/32+1/64+1/128 =15/16+1/32+1/64+1/128 =31/31+1/64+1/128 =63/64+1/128 =127/128.

Simple calculation: 1 + 2 / 1 + 4 / 1 + 8 / 1 +... + 64 / 1

1+1/2+1/4+1/8+...+1/64
=1+(1-1/2)+(1/2-1/4)+(1/4-1/8)+...+(1/32-1/64)
=1+1-1/2+1/2-1/4+1/4-1/8+...+1/32-1/64
=1+1-1/64
=2-1/64
=127/64