1. Simple calculation. 6 / 7 * 5 / 8 + 3 / 8 △ 7 / 6
How to calculate 8.6 × 2.7 + 3.5 × 1.6 simply?
8.6 2.7 3.5 1.6 is changed into fractions, respectively
=86/10X27/10+35/10X16/10
=2322/10+1260/10
=3582/10
=358.2