84.3 * 10.2 simple calculation

84.3 * 10.2 simple calculation

84.3×10.2
=84.3×10+84.3×0.2
=843+16.86
=859.86
Another way is to take 84.3 apart. However, it is easier to take 10.2 apart

How to calculate 2 out of 13 * 11 out of 3 * 7 out of 4 + 3 out of 13 * 11 out of 2 * 7 out of 3

2 of 13 * 11 of 3 * 7 of 4 + 3 of 13 * 11 of 2 * 7 of 3
=2/13*3/11*4/7+3/13*2/11*3/7
=2/13*3/11*4/7+2/13*3/11*3/7
=2/13*3/11*(4/7+3/7)
=6/143

7.2 divided by 0.9 7.2 divided by 1.8
The simple calculation of 7.2 divided by 0.9 + 7.2 divided by 1.8 is like this

7.2÷0.9=72÷9=8
7.2÷1.8=72÷18=4

2-3 / 8 divided by 7 / 16-1 / 7

2-3 / 8 divided by 7 / 16-1 / 7
=2-(3/8)×(16/7) -1/7
=2- 6/7-1/7
=2-(6/7+1/7)
=2-1
=1