扬帆起航
$7.96 - 0.65 =$ $3.86 - 1.86 =$ $9.99 - 0.77 =$
$3.65 + 2.4 =$ $85.3 - 60 =$ $2.11 - 0.3 =$
$6.7 + 8.9 =$ $6.53 - 4.53 =$ $5.99 + 2.78 =$
$7.32 - 5.2 =$ $8.69 + 3.54 =$ $10.12 - 0.12 =$

1. $7.96 - 0.65 =7.31$
2. $3.86 - 1.86 =2$
3. $9.99 - 0.77 =9.22$
4. $3.65 + 2.4 =6.05$
5. $85.3 - 60 =25.3$
6. $2.11 - 0.3 =1.81$
7. $6.7 + 8.9 =15.6$
8. $6.53 - 4.53 =2$
9. $5.99 + 2.78 =8.77$
10. $7.32 - 5.2 =2.12$
11. $8.69 + 3.54 =12.23$
12. $10.12 - 0.12 =10$

乘风破浪
$5.7 - 3.7 =$ $12.5 + 4.5 =$ $27.4 + 72.6 =$
$8.2 + 2.8 =$ $45.61 - 13.5 =$ $95.1 - 0.8 =$
$73.4 - 5.5 =$ $96.7 + 4.3 =$ $65.1 + 34.9 =$
$55.3 - 25.4 =$ $34.7 + 25.3 =$ $44.3 + 4.55 =$
$17.63 + 5.37 =$ $2.3 + 7.9 =$ $5.7 + 3.7 =$
$11.3 + 4.24 =$ $4.4 + 2.9 =$ $85.3 - 45.3 =$
$1 - 0.93 =$ $92 ÷ 46 =$ $1.8 × 2 =$
$1.2 × 0.4 =$ $5700 + 299 =$ $6.78 - 1.78 =$
$3.28 + 0.72 =$ $12 - 10.4 =$ $0.65 + 0.5 =$
$7.9 × 0.01 =$ $5.2 × 30 =$ $13 - 3.1 =$

$5.7 - 3.7 = 2$
$12.5 + 4.5 = 17$
$27.4 + 72.6 = 100$
$8.2 + 2.8 = 11$
$45.61 - 13.5 = 32.11$
$95.1 - 0.8 = 94.3$
$73.4 - 5.5 = 67.9$
$96.7 + 4.3 = 101$
$65.1 + 34.9 = 100$
$55.3 - 25.4 = 29.9$
$34.7 + 25.3 = 60$
$44.3 + 4.55 = 48.85$
$17.63 + 5.37 = 23$
$2.3 + 7.9 = 10.2$
$5.7 + 3.7 = 9.4$
$11.3 + 4.24 = 15.54$
$4.4 + 2.9 = 7.3$
$85.3 - 45.3 = 40$
$1 - 0.93 = 0.07$
$92 ÷ 46 = 2$
$1.8 × 2 = 3.6$
$1.2 × 0.4 = 0.48$
$5700 + 299 = 5999$
$6.78 - 1.78 = 5$
$3.28 + 0.72 = 4$
$12 - 10.4 = 1.6$
$0.65 + 0.5 = 1.15$
$7.9 × 0.01 = 0.079$
$5.2 × 30 = 156$
$13 - 3.1 = 9.9$

圆满返航
在跳远比赛中，笑笑跳了165厘米，淘气跳了1.98米，奇思跳了19分米，妙想跳了1.72米，()得了第一名，()得了第三名。
秘籍点拨 先将各长度统一单位后，再比较大小。
第77片

1. 统一单位为米：
笑笑：165厘米 = 1.65米
淘气：1.98米
奇思：19分米 = 1.9米
妙想：1.72米
2. 比较大小：1.98米 ＞ 1.9米 ＞ 1.72米 ＞ 1.65米
3. 结论：淘气得了第一名，妙想得了第三名。
淘气；妙想