1. 直接写得数。
①$5.9 - 4.7 =$
②$4.2 - 2.4 =$
③$1.3 + 8.2 =$
④$8.2 - 7.3 =$
⑤$4.5 + 2.6 =$
⑥$3.3 + 6.6 =$
⑦$6.5 - 3.7 =$
⑧$1.1 + 6.4 =$
⑨$2.3 + 4.2 =$
⑩$9.8 - 9.1 =$
⑪$3.6 - 0.8 =$
⑫$2.5 + 1.2 =$
⑬$3.9 - 1.2 =$
⑭$7.5 + 0.6 =$
⑮$1.8 + 6.1 =$
⑯$6.4 - 3.1 =$
⑰$4.3 + 4.3 =$
⑱$6.6 + 1.3 =$
⑲$1.1 + 5.6 =$
⑳$2.6 + 2.8 =$
㉑$7.8 - 2.5 =$
㉒$9.3 - 3.1 =$
㉓$3.8 + 3.4 =$
㉔$3.5 - 1.6 =$
㉕$3.9 + 2.4 =$
㉖$6.2 - 2.8 =$
㉗$7.2 - 5.1 =$
㉘$4.2 + 2.5 =$
㉙$5.7 + 2.6 =$
㉚$2.9 + 6.3 =$
㉛$5.8 - 1.9 =$
㉜$3.1 + 5.6 =$
㉝$2.4 + 2.4 =$
㉞$2.5 - 2.1 =$
㉟$1.9 + 5.7 =$
㊱$2.7 - 0.5 =$

①$5.9 - 4.7 = 1.2$
②$4.2 - 2.4 = 1.8$
③$1.3 + 8.2 = 9.5$
④$8.2 - 7.3 = 0.9$
⑤$4.5 + 2.6 = 7.1$
⑥$3.3 + 6.6 = 9.9$
⑦$6.5 - 3.7 = 2.8$
⑧$1.1 + 6.4 = 7.5$
⑨$2.3 + 4.2 = 6.5$
⑩$9.8 - 9.1 = 0.7$
⑪$3.6 - 0.8 = 2.8$
⑫$2.5 + 1.2 = 3.7$
⑬$3.9 - 1.2 = 2.7$
⑭$7.5 + 0.6 = 8.1$
⑮$1.8 + 6.1 = 7.9$
⑯$6.4 - 3.1 = 3.3$
⑰$4.3 + 4.3 = 8.6$
⑱$6.6 + 1.3 = 7.9$
⑲$1.1 + 5.6 = 6.7$
⑳$2.6 + 2.8 = 5.4$
㉑$7.8 - 2.5 = 5.3$
㉒$9.3 - 3.1 = 6.2$
㉓$3.8 + 3.4 = 7.2$
㉔$3.5 - 1.6 = 1.9$
㉕$3.9 + 2.4 = 6.3$
㉖$6.2 - 2.8 = 3.4$
㉗$7.2 - 5.1 = 2.1$
㉘$4.2 + 2.5 = 6.7$
㉙$5.7 + 2.6 = 8.3$
㉚$2.9 + 6.3 = 9.2$
㉛$5.8 - 1.9 = 3.9$
㉜$3.1 + 5.6 = 8.7$
㉝$2.4 + 2.4 = 4.8$
㉞$2.5 - 2.1 = 0.4$
㉟$1.9 + 5.7 = 7.6$
㊱$2.7 - 0.5 = 2.2$

2. 在○里填上“＞”或“＜”。
①0.61○0.69
②1.78○1.52
③8.31○8.28
④21.81○23.06
⑤8.2○7.6
⑥0.85○0.88
⑦16.3○10.6
⑧0.35○0.40
⑨0.05○0.049
⑩80.05○80.5
⑪0.55○0.085
⑫1.52○1.45
⑬3.85○3.62
⑭8.81○8.808
⑮0.709○0.71
⑯48.88○48.08
⑰3.48○3.84
⑱5.12○5.02

①＜
②＞
③＞
④＜
⑤＞
⑥＜
⑦＞
⑧＜
⑨＞
⑩＜
⑪＞
⑫＞
⑬＞
⑭＞
⑮＜
⑯＞
⑰＜
⑱＞