9.87×11-7.9用简便方法怎样计算?

2024-11-23 08:47:12
推荐回答(5个)
回答(1):

9.87×(10+1)-7.9
=9.87×10+9.87×1-7.9
=98.7+9.87-7.9
=108.57-7.9
=100.67

回答(2):

9.87×11-7.9
=9.87×(10+1)-(8.0-0.1)
=9.87×10+9.87×1-8.0+0.1
=98.7-8.0+(9.87+0.1)
=90.7+9.88
=90.7+10-0.12
=100.7-0.12
=100.58

回答(3):

所谓简便运算就是将复杂的算术变成口算, 如下供参考,希望对您有帮助

回答(4):

9.87X(10十1)一7.9
98.7+9.87-7.9
108.57-7.9
100.67

回答(5):

9.87X11-7.9
=9.87X10+9.87X1-8+0.1
=98.7+9.87-8+0.1
=98.8+1.87
=10.67