What's the easy way to multiply 17 by 10.3? It's going to take (one minute)

What's the easy way to multiply 17 by 10.3? It's going to take (one minute)

17×10.3
= 17×（10+0.3）
=17×10 +17×0．3
＝170　＋　5．1
＝175．1

Simple calculation of 4 × 4.005 × 2.52.8 × 10.168.5 × 3.8 + 6.85 × 63-6.85

4×4.005x2.5
=4×2.5x4.005
=10x4.005
=40.05

Simple calculation of 11 out of 13 times 8 out of 15 plus 8 out of 13 times 4 out of 15

11 of 13 × 8 of 15 + 8 of 13 × 4 of 15
=8 of 13 × 11 of 15 + 8 of 13 × 4 of 15
=8 out of 13 × (11 out of 15 + 4 out of 15)
=8 / 13 × 1
=8 out of 13

6 out of 11 minus 6 out of 11 times 7 out of 8
6 out of 11 minus 6 out of 11 times 7 out of 8

Six out of eleven minus six out of eleven times seven out of eight
=6 / 11 (1-7 / 8)
=6/11x1/8
=3/11x/4
=3/44