Question

求这些题的计算过程和答案，急，5:30前回复

Answer 1

5.12+2.54+4.88=（5.12+4.88）+2.54=10+2.54=12.54
12.5x17.8x0.8=（12.5x4）x17.8x0.2=（50x0.2）x17.8=10x17.8=178
9.9x2.5=（10-0.1）x2.5=10x2.5-0.1x2.5=25-0.25=24.75

9.4x5.8+10.6x5.8=5.8x（9.4+10.6）=5.8x20=58x2=116
0.125x0.32x0.25=0.125x（0.8x0.4）x0.25=（0.125x0.8）x（0.4x0.25）=0.1x0.1=0.01
9.6+9.6x99=9.6x（1+99）=9.6x100=960

2.8x7.6+1.4x2.8+2.8=2.8x（7.6+1.4+1）=2.8x10=28
6.3x10.1=6.3x（10+0.1）=6.3x10+6.3x0.1=63+0.63=63.63
0.25x3.2x12.5=0.25x（4x0.8）x12.5=（0.25x4）x（0.8x12.5）=1x10=10

12.5x9.7+12.5x8.7=12.5x（9.7+8.7）=12.5x18.4=12.5x（8x2.3）=（12.5x8）x2.3=100x2.3=230
3.7x91.6+6.3x91.6=91.6x（3.7+6.3）=91.6x10=916

16.84÷40÷0.25=16.84÷（40x0.25）=16.84÷10=1.684
12.5x0.4x2.5x8=（12.5x8）x（0.4x2.5）=100x1=100

4.2x7.8+2.2x4.2=4.2x（7.8+2.2）=4.2x10=42
2.55x7.1+2.45x7.1=（2.55+2.45）x7.1=5x7.1=35.5

Answer 2

5.12+4.88+2.54=10+2.54=12.54

12.5x0.8x17.8=10x17.8=178

(10-0.1)x2.5=25-0.25=24.75

(9.4+10.6)x5.8=20x5.8=116

0.25x0.4x0.125x8=0.01

9.6x（1+99）=9.6x100=96

2.8x(7.6+1.4)+2.8=28+2.8=30.8

6.3x(10+0.1)=63+6.3=69.3
0.25x0.4x12.5x0.8=0.1x10=1

12.5x(9.7+8.7)=12.5x18.4=338.56

91.6x(6.3+3.7)=91.6x10=916

18/(40x0.25)=18/10=1.8

12.5x8x2.5x4=100x10=1000

4.2x(7.8+2.2)=4.2x10=42

7.1x(2.55+2.45)=7.1x5=35.5
可以不？

Answer 3

追答

Answer 4

Answer 5

答案：（横排）12.54
178
24.75
116
0.01
960
28
63.63
10
230
916
1.684
100
42
35.5