Answer:Here are the products for each group of decimal multiplications:1. 68.2 × 630 × 16.0 × 5.52 × 32.3 = 122,570,654.9762. 8.4 × 1.2 × 36 × 0.25 × 26 = 2,358.723. 7.91 × 26.3 × 3.07 × 63.2 × 0.394 = 15,903.1775480484. 0.19 × 7.8 × 19 × 8.5 × 70 = 16,754.015. 55.8 × 596 × 940 × 203 = 6,346,062,5766. 0.707 × 9.4 × 3.6 × 8.2 × 42 × 0.97 = 7,992.536811847. 906 × 64 × 310 × 520 × 131 × 1.8 × 0.92 × 0.41 = 831,359,174,750.208**8. 6.00 × 5.1 × 5.1 = 156.069. 0.913 × 12.8 × 52.2 × 56 × 3.8 × 2.3 = 298,573.122355210. 0.394 × 76 = 29.944**11. 0.411 × 0.35 = 0.14385*Step-by-step explanation: