Question

3.54*9.9+3.54*0.1 2.9*0.45+0.29*4.2+0.029*13 6.4*99 9.58*0.8

Answer 1

3.54 x 9.9 +3.54 x 0.1 = 3.54 x ( 9.9 + 0.1 ) = 3.54 x 10 = 35.4

2.9 x 0.45 + 0.29 x 4.2 + 0.029 * 13 = 0.29 x 10 x 0.45 +0.29 x 4.2 + 0.29 x 0.1 x 13

=0.29 x ( 4.5 + 4.2 +1.3 ) = 0.29 x 10 = 2.9

6.4 x 99.9 = 6.4 x ( 100 - 0.1 ) = 6.4 x 100 - 6.4 x 0.1 = 640 - 0.64 = 639.36

9.58 x 0.8 x 1.25 =9.58 x ( 0.8 x 1.25 ) = 9.58 x 1 =9.58

101 x 0.68 = ( 100 + 1) x 0.68 = 100 x 0.68 + 1 x 0.68 = 68 + 0.68 =68.68