Multiplying decimals using mental strategies

Maths

Doubling, doubling again and then doubling again

1.99 x 2 (double) and then the answer x 2 (double)

At the supermarket it costs £1.99 for one pack of berries.  Which equation could I use to find out how much 6 packets were?

Priya travels 19.3 km every day. How far does she travel over four days?

Tickets for a show cost £23.67. How much do seven tickets cost?

Train tickets cost £7.93. If Steve, his wife and three children go on a trip, how much will it cost them?