Mental Multiplications Grouping Numbers in Mental Multiplications © T Madas

2 x 53 x 5 = 10 x 53 = 530 2 x 19 x 5 = 10 x 19 = 190 2 x 13 x 50 = 100 x 13 = 1300 4 x 43 x 25 = 100 x 43 = 4300 2 x 9 x 2.5 = 5 x 9 = 45 4 x 77 x 2.5 = 10 x 77 = 770 © T Madas

4 x 91 x 25 = 100 x 91 = 9100 2 x 17 x 50 = 100 x 17 = 1700 4 x 33 x 25 = 100 x 33 = 3300 2 x 11 x 500 = 1000 x 11 = 11000 4 x 16 x 25 = 100 x 16 = 1600 4 x 26 x 250 = 1000 x 26 = 26000 © T Madas

8 x 9 x 125 = 1000 x 9 = 9000 8 x 2 x 125 = 1000 x 2 = 2000 8 x 43 x 125 = 1000 x 43 = 43000 8 x 12 x 12.5 = 100 x 12 = 1200 8 x 36 x 1.25 = 10 x 36 = 360 4 x 7 x 125 = 500 x 7 = 3500 © T Madas

6 x 9 x 5 = 30 x 9 = 270 5 x 7 x 8 = 40 x 7 = 280 4 x 12 x 5 = 20 x 12 = 240 5 x 12 x 6 = 30 x 12 = 360 12 x 9 x 5 = 60 x 9 = 540 5 x 3 x 16 = 80 x 3 = 240 © T Madas

© T Madas

2 x 78 x 0.5 = 1 x 78 = 78 20 x 89 x 0.5 = 10 x 89 = 890 40 x 37 x 0.25 = 10 x 37 = 370 50 x 4.3 x 0.2 = 10 x 4.3 = 43 500 x 9.4 x 0.2 = 100 x 9.4 = 940 500 x 9 x 0.02 = 10 x 9 = 90 © T Madas

4 x 71 x 2.5 = 10 x 71 = 710 0.2 x 1.7 x 50 = 10 x 1.7 = 17 0.4 x 63 x 25 = 10 x 63 = 630 0.2 x 1.1 x 500 = 100 x 1.1 = 110 4 x 56 x 0.25 = 1 x 56 = 56 0.4 x 75 x 250 = 100 x 75 = 7500 © T Madas

8 x 0.2 x 125 = 1000 x 0.2 = 200 8 x 39 x 1.25 = 10 x 39 = 390 8 x 4.3 x 12.5 = 100 x 4.3 = 430 0.8 x 42 x 125 = 100 x 42 = 4200 0.8 x 66 x 1.25 = 1 x 66 = 66 0.8 x 0.7 x 1250 = 1000 x 0.7 = 700 © T Madas

6 x 0.9 x 5 = 30 x 0.9 = 27 5 x 1.1 x 0.8 = 4 x 1.1 = 4.4 0.4 x 32 x 5 = 2 x 32 = 64 5 x 7.5 x 0.6 = 3 x 7.5 = 22.5 1.2 x 0.7 x 5 = 6 x 0.7 = 4.2 5 x 0.15 x 1.6 = 8 x 0.15 = 1.2 © T Madas

© T Madas