扬帆起航
3. 7 + 4. 8 =
0. 7 + 0. 9 =
10 - 0. 1 =
1. 64 + 2. 35 =
1. 3 + 4. 3 =
19. 8 - 5. 6 =
40 + 58. 2 =
8 + 21. 02 =
7. 2 - 6. 45 =
4. 8 + 5. 2 =
2 - 0. 75 =
6 + 6. 6 =

3.7+4.8=8.5
0.7+0.9=1.6
10-0.1=9.9
1.64+2.35=3.99
1.3+4.3=5.6
19.8-5.6=14.2
40+58.2=98.2
8+21.02=29.02
7.2-6.45=0.75
4.8+5.2=10
2-0.75=1.25
6+6.6=12.6

乘风破浪
2. 03 + 2. 03 =
7. 8 + 1. 6 =
93. 1 - 20. 9 =
7. 2 - 6. 45 =
2. 98 + 0. 56 =
0. 24 - 0. 07 =
1 - 0. 44 =
14 + 0. 78 =
7. 2 + 6. 9 =
1. 6 - 0. 9 =
4. 5 - 4 =
12. 53 + 4. 67 =
5 - 0. 41 =
0. 89 - 0. 25 =
8. 1 - 5. 1 =
8 + 0. 42 =
3. 25 + 0. 75 =
0. 9 + 1 =
8. 34 - 6. 22 =
2. 5 + 0. 9 =
4. 5 - 2. 83 =
3 - 1. 4 =
6. 77 - 1. 78 =
0. 33 + 9. 8 =
9. 3 - 8. 8 =
136. 5 - 105 =
0. 24 + 0. 63 =
79. 2 + 56. 8 =
6. 07 + 4. 89 =
3 - 0. 45 =

2.03+2.03=4.06
7.8+1.6=9.4
93.1-20.9=72.2
7.2-6.45=0.75
2.98+0.56=3.54
0.24-0.07=0.17
1-0.44=0.56
14+0.78=14.78
7.2+6.9=14.1
1.6-0.9=0.7
4.5-4=0.5
12.53+4.67=17.2
5-0.41=4.59
0.89-0.25=0.64
8.1-5.1=3
8+0.42=8.42
3.25+0.75=4
0.9+1=1.9
8.34-6.22=2.12
2.5+0.9=3.4
4.5-2.83=1.67
3-1.4=1.6
6.77-1.78=4.99
0.33+9.8=10.13
9.3-8.8=0.5
136.5-105=31.5
0.24+0.63=0.87
79.2+56.8=136
6.07+4.89=10.96
3-0.45=2.55

圆满返航
妈妈在家烙饼，锅中每次最多烙 2 张饼，烙熟一张饼需要 6 分钟(每面烙熟需要 3 分钟)。烙熟 9 张饼至少需要()分钟。
秘籍点拨 9 张饼一共要烙几面？需要烙几次？
第 66 片

1. 计算总面数：9张饼，每张2面，共9×2=18面。
2. 计算烙饼次数：每次最多烙2面，需烙18÷2=9次。
3. 计算总时间：每次烙1面需3分钟，总时间为9×3=27分钟。
27