问题描述:
0.8×2/11+4.8×以括号-2/7括号减2.2÷3/7+0.8×9/11
最佳答案:
解:
0.8×2/11+4.8×(-2/7)-2.2÷3/7+0.8×9/11
=1.6/11-28.8/21-2.2/21+7.2/11
=8.8/11-31/21
=0.8-31/21
=16.8/21-31/21
=-14.2/21
=-71/105
计算:0.8×2/11+4.8×(-2/7)-2.2÷3/7+0.8×9/11
问题描述:
0.8×2/11+4.8×以括号-2/7括号减2.2÷3/7+0.8×9/11
解:
0.8×2/11+4.8×(-2/7)-2.2÷3/7+0.8×9/11
=1.6/11-28.8/21-2.2/21+7.2/11
=8.8/11-31/21
=0.8-31/21
=16.8/21-31/21
=-14.2/21
=-71/105