Question

用简便方法计算 25.48-(9.4-0.52) 7.3+2.7-7.3+2.7 4.8+8.63

用简便方法计算
25.48-(9.4-0.52)
7.3+2.7-7.3+2.7
4.8+8.63+5.2+0.37
5.84-1.8-3.2
132.44-(58.74+19.44)
35.6-1.8-15.6-7.2

Answer 1

25.48-(9.4-0.52)=25.48+0.52-9.4=26-9.4=16.6
7.3+2.7-7.3+2.7=7.3-7.3+2.7+2.7=0+5.4=5.4
4.8+8.63+5.2+0.37=4.8+5.2+8.63+0.37=10+9=19
5.84-1.8-3.2=5.84-(1.8+3.2)=5.84-5=0.84
132.44-(58.74+19.44)=132.44-19.44-58.74=113-60+1.26=74.26
35.6-1.8-15.6-7.2=35.6-15.6-(1.8+7.2)=20-10=10

追问

倒数第二个是等于54.26

追答

是，笔误哈

Answer 2

追答

2：原式=(7.3一7.3)十(2.7十2.7)=5.4

3：(4.8十5.2)十(8 .63十0.37)=19

5.84一(1.8十3.2)=0.84