用简便方法计算下题:12.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×4 7.6×0.8+0.2×7.6 0.85×19912.5×0.96×0.8 急
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 08:51:32
![用简便方法计算下题:12.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×4 7.6×0.8+0.2×7.6 0.85×19912.5×0.96×0.8 急](/uploads/image/z/130974-6-4.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%A2%98%EF%BC%9A12.7-%EF%BC%883.7%2B0.84%EF%BC%89+36.54-1.76-4.54+0.25%C3%970.73%C3%974+7.6%C3%970.8%2B0.2%C3%977.6+0.85%C3%9719912.5%C3%970.96%C3%970.8+%E6%80%A5)
用简便方法计算下题:12.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×4 7.6×0.8+0.2×7.6 0.85×19912.5×0.96×0.8 急
用简便方法计算下题:12.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×4 7.6×0.8+0.2×7.6 0.85×199
12.5×0.96×0.8 急
用简便方法计算下题:12.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×4 7.6×0.8+0.2×7.6 0.85×19912.5×0.96×0.8 急
12.7-(3.7+0.84)=(12.7-3.7)-0.84=9-0.84=8.16
36.54-1.76-4.54=(36.54-4.54)-1.76=32-1.76=30.24
0.25×0.73×4=(0.25*4)*0.73=1*0.73=0.73
7.6×0.8+0.2×7.6=7.6*(0.8+0.2)=7.6*1=7.6
0.85×199=0.85*(200-1)=0.85*200-0.85*1=170-0.85=169.15
12.5×0.96×0.8=(12.5*0.8)*0.96=10*0.96=9.6