下面三道题能用简算用简算,不能用就用脱试计算:22-1.6×7、0.89×4.8+0.89×5.2、10-0.34-0.66
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![下面三道题能用简算用简算,不能用就用脱试计算:22-1.6×7、0.89×4.8+0.89×5.2、10-0.34-0.66](/uploads/image/z/133410-66-0.jpg?t=%E4%B8%8B%E9%9D%A2%E4%B8%89%E9%81%93%E9%A2%98%E8%83%BD%E7%94%A8%E7%AE%80%E7%AE%97%E7%94%A8%E7%AE%80%E7%AE%97%2C%E4%B8%8D%E8%83%BD%E7%94%A8%E5%B0%B1%E7%94%A8%E8%84%B1%E8%AF%95%E8%AE%A1%E7%AE%97%EF%BC%9A22-1.6%C3%977%E3%80%810.89%C3%974.8%2B0.89%C3%975.2%E3%80%8110-0.34-0.66)
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下面三道题能用简算用简算,不能用就用脱试计算:22-1.6×7、0.89×4.8+0.89×5.2、10-0.34-0.66
下面三道题能用简算用简算,不能用就用脱试计算:22-1.6×7、0.89×4.8+0.89×5.2、10-0.34-0.66
下面三道题能用简算用简算,不能用就用脱试计算:22-1.6×7、0.89×4.8+0.89×5.2、10-0.34-0.66
22-1.6x7=22-11.2=10.8
0.89x4.8+0.89x5.2=0.89x(4.8+5.2)=0.89x10=8.9
10-0.34-0.66=10-(0.34+0.66)=10-1=9
1 10.8
2 0.89(4.8+5.2)=0.89*10=8.9
3 10-(0.34+0.66)=10-1=9