2.02X8.5
=2X8.5+0.02X8.5
=17+0.17
=17.17
1.25+4.6+0.75
=1.25+0.75+4.6
=2+4.6
=6.6
1.6X7.5X1.25
=2X7.5X(0.8X1.25)
=15X1
=15
56X1.25
=7X8X1.25
=7X(8X1.25
=7X10
=70
3.4X1.7X1.5
=2X1.7X1.7X1.5
=2X1.5X1.7X1.7
=3X1.7X1.7
=5.1X1.7
=5X1.7+0.1X1.7
=8.5+0.17
=8.67
0.8X0.25X0.4X12.5
=0.8X12.5X(0.25X0.4)
=10X0.1
=1
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