脱式计算. 63.5-17.25-12.73 0.51×7.36+7.36×0.49 18.63-3.2×0.6×7 3-0.07×(11.46-0.46)

问题描述:

脱式计算.
63.5-17.25-12.73    
0.51×7.36+7.36×0.49
18.63-3.2×0.6×7     3-0.07×(11.46-0.46)

①63.5-17.25-12.73
=63.5-(17.25+12.73)
=63.5-29.98
=33.52;
②0.51×7.36+7.36×0.49
=7.36×(0.49+0.51)
=7.36×1
=7.36;
③18.63-3.2×0.6×7
=18.63-13.44
=5.19;
④3-0.07×(11.46-0.46)
=3-0.07×11
=3-0.77
=2.23;