脱式计算．（能简算的要简算）（30-19.8）×0.6+31.210-（6+3.03）×1.0173.6×27+73.6×7349.2-0.5×0.5-8.75（291-38×3.5-35.5）÷3.512.5×0.56×0.4×0.8×250

Question

脱式计算．（能简算的要简算）

（30-19.8）×0.6+31.2	10-（6+3.03）×1.01	73.6×27+73.6×73
49.2-0.5×0.5-8.75	（291-38×3.5-35.5）÷3.5	12.5×0.56×0.4×0.8×250

Answer 1

（1）（30-19.8）×0.6+31.2
=10.2×0.6+31.2
=6.12+31.2
=37.32；

（2）10-（6+3.03）×1.01
=10-9.03×1.01
=10-9.1203
=0.8797；

（3）73.6×27+73.6×73
=73.6×（27+73）
=73.6×100
=7360；

（4）49.2-0.5×0.5-8.75
=49.2-0.25-8.75
=49.2-（0.25+8.75）
=49.2-9
=40.2；

（5）（291-38×3.5-35.5）÷3.5
=（291-133-35.5）÷3.5
=122.5÷3.5
=35；

（6）12.5×0.56×0.4×0.8×250
=12.5×0.8×（250×0.4）×0.56
=10×100×0.56
=560．