一、口算。
1.8-0.1= 6.1-2.1= 0.6-0.47= 7.4-0.7=
2.7+0.1= 7.2-4.6= 0.7-0.39= 1+0.5=
6.3-0.2= 6.7-1.4= 0.74-0.08= 7.5-0.3=
4.4+0.9= 9-2.7= 0.73+0.04= 8.8-0.4=
1.9-0.9= 8+2.5= 0.63-0.37= 6.9-0.3=
8.7+0.8= 8.5-3.8= 0.62+0.38= 5.4+0.3=
8.5+0.4= 8.8-3= 0.81+0.32= 5.9+0.4=
8+0.6= 8.7+1.8= 0.67-0.04= 2.9-0.4=
二、混合运算。
0.6-0.13+1.4 8.9-0.28-2.72 64.7+15.2-42.3
84.4+47.01+28.24 69.48+37.7+54.38 8.7-5.28-1.18
60-(4.46-0.6) 74.6+(14+9.8) 8.02+5.93+1.89
一、口算。
2.7-0.8= 7.4-0.9= 0.74-0.31= 1.8+0.5=
1.1+0.7= 8.4+4.8= 0.68+0.09= 7.9+0.3=
5.8+0.1= 7.3+2.2= 0.63-0.06= 5.9+0.6=
4+0.8= 7.9-4.3= 0.76+0.06= 7.7-0.3=
3.5-0.3= 7+4.4= 0.73+0.09= 5.8-0.3=
7.4-0.9= 7.1-1.4= 0.87-0.49= 1.1-0.8=
3.7+0.4= 8.3-4= 0.85-0.15= 6.8-0.4=
1.4+0.9= 8.4-2.3= 0.67-0.25= 2.4+0.9=
二、混合运算。
0.67-0.29+2.9 9.6-0.43-1.57 42.1+20.4+12.3
70.3-30.39+24.44 66.43-40.75+22.26 4.82-2.32-1.41
60-(5.72+0.42) 66.6+(23.8-4.2) 4.51+1.19-1.14
一、口算。
6.9+0.4= 6.7+0.5= 0.89+0.49= 2.7-0.1=
4.9+0.4= 7.4+2.3= 0.8-0.4= 7.4+0.9=
3.2-0.5= 7.8-0.9= 0.76+0.02= 4.9+0.1=
7+0.1= 7.3+4.7= 0.69+0.11= 4.6-0.9=
3.7-0.2= 7.2-1.1= 0.65+0.49= 3.2+0.9=
7.3+0.5= 7.9-1= 0.8-0.1= 5.7-0.3=
3.5-0.3= 6.7-3.5= 0.6+0.18= 2.6+0.9=
4.5+0.7= 8.3+4.8= 0.74+0.24= 7.2-0.8=
二、混合运算。
0.78-0.38+3 5.7-0.43-2.57 80.2-25.4+42.7
75.65+21.38+80.2 76.07-30.99+80.19 5.92-3.19+1.76
50-(3.56-0.47) 76.1-(19.2+5.1) 6.97+4.83+1.95
一、口算。
3.6-0.9= 8.9+2.4= 0.82-0.18= 1+0.3=
8.4-0.1= 8.5+2.5= 0.74+0.27= 6.9+0.3=
7.5+0.5= 6.1+3.1= 0.89+0.01= 1+0.2=
3.9-0.2= 6.6-3.9= 0.83-0.38= 2.8-0.1=
8.2+0.5= 7.7-0.1= 0.62+0.12= 5.6-0.2=
2.8+0.4= 7.8+1.2= 0.64-0.45= 2.2-0.8=
2.3-0.9= 8.6-4.2= 0.68+0.25= 2.8+0.6=
5.3+0.3= 6.8+3.4= 0.68-0.05= 4.4+0.8=
二、混合运算。
0.66-0.05+1.7 5.9-0.53-0.47 46.7+19.6-25.1
61.97-30.42+27.67 66.18-33.96+62.98 5.22+1.7+2.76
40-(6.15-0.89) 88.8+(20.5-2.6) 4.43-2.48+1.85
一、口算。
6.8-0.4= 6.2+2= 0.7-0.06= 1.7+0.6=
8.5+0.6= 8.3+3.7= 0.7+0.43= 6.9+0.6=
1.9+0.7= 9-0.7= 0.66+0.25= 7.5+0.1=
2.5+0.2= 6.3+4.6= 0.78-0.32= 6.7-0.3=
8.3+0.8= 8.9+0.5= 0.8+0.24= 5.7-0.9=
6+0.8= 7+1.7= 0.78-0.44= 7.3+0.3=
8.8+0.1= 8.6+2.2= 0.66-0.15= 2.3-0.7=
8.1-0.8= 7+0.1= 0.81+0.49= 1.5+0.9=
二、混合运算。
0.81+0.26+9.2 7.9-0.27-0.73 94.4-66.5+12.1
70.27-32.89+72.54 79.93+43.11+58.11 4.48+2.27-2.01
80-(8.12-0.8) 64.8-(29.1-3.7) 4.07-1.91-1.16
一、口算。
3.3-0.1= 7.6-2.5= 0.73+0.27= 7.7-0.4=
2.7-0.3= 7.1-4.3= 0.87+0.06= 2.9-0.4=
1+0.9= 8.1-1.3= 0.9-0.44= 4.7-0.6=
3.7-0.6= 8.5-3.1= 0.69+0.1= 8.5+0.2=
1.9+0.3= 7.7-3.4= 0.9+0.02= 2.5+0.3=
3.3+0.4= 8-3.6= 0.84+0.33= 8.5-0.2=
3.1+0.9= 6.8-1.4= 0.83+0.12= 4.9-0.3=
5.1+0.6= 7.1-0.1= 0.75+0.47= 6.7-0.6=
二、混合运算。
0.82+0.46+4.4 8.1-0.13-4.87 45.8-10.4-17.6
64.25+28.41+36.53 65.29-32.26+42.29 7.08-3.38-2.97
20-(1.17-0.66) 91.5-(11.7-1.4) 3.51-1.32+1.32
一、口算。
4.6-0.6= 8.1+2= 0.82-0.19= 3.7+0.1=
1.3+0.6= 6.1-1.1= 0.73-0.1= 9+0.5=
5-0.4= 8.6-2.5= 0.82+0.04= 2.4-0.2=
1.7+0.9= 7.9+4.7= 0.7+0.31= 5.9-0.7=
3.6+0.1= 7-4.6= 0.89+0.16= 3.5-0.9=
1.4+0.9= 7.8+2.2= 0.67-0.31= 1.1+0.1=
8.7+0.4= 6.4+2.8= 0.63+0.1= 1.5+0.7=
4.7+0.6= 8.6+2.1= 0.76-0.15= 2.2-0.7=
二、混合运算。
0.85-0.11+0.7 9.6-0.29-0.71 36.4+14.2-17.6
72.2+40.19+87 76.43-22.07+70.04 7.06+3.72+2.34
40-(9.55+0.98) 92.4-(27.6+8.6) 4.27-1.73+1.88
一、口算。
3.3+0.5= 7.1-0.1= 0.86-0.21= 6.4-0.2=
7.5-0.9= 8.2+3.4= 0.73+0.28= 3.1+0.1=
8.1+0.9= 8.4+2.6= 0.81+0.03= 4.8+0.7=
6.6+0.8= 7.9-2.2= 0.72-0.01= 3.6-0.9=
7.2-0.3= 6.5+1.5= 0.81-0.21= 3.6+0.7=
5-0.1= 9-0.8= 0.68-0.17= 2.8-0.4=
2.4+0.3= 8.2-4.3= 0.73+0.03= 5.1-0.3=
7-0.7= 6+1= 0.83-0.27= 8.9+0.7=
二、混合运算。
0.83+0.09+2.1 6-0.32-4.68 94.6-17.2-24.2
86.03+15.7+76.49 61.27-33+78.72 6.37+3.27+2.22
50-(8.22-0.69) 65.1-(21.1-3) 6.98-4.1-2.65
一、口算。
8.4-0.1= 6.7-3.6= 0.83+0.2= 6.6-0.5=
5+0.2= 7.7+2= 0.7-0.2= 3+0.3=
7.3-0.8= 7.6+4.4= 0.81+0.13= 5.3-0.8=
6.8-0.4= 7.9+4.8= 0.78-0.29= 5.7-0.6=
9-0.3= 8.2-3.9= 0.75+0.43= 5.7-0.6=
3.9+0.8= 8.6+4.9= 0.88-0.39= 8.8+0.3=
1.5+0.6= 8.1-2.1= 0.9-0.28= 6.9-0.9=
7-0.5= 8.3+4= 0.67-0.12= 2.9-0.2=
二、混合运算。
0.68+0.33+2.6 9.6-0.38-2.62 89.7-69.1-11.5
73.33-18.26+62.47 62.51-44.04+41.35 8.3+6.29+1.92
90-(5.52+0.58) 63.7+(19.5-9.9) 4.72-3.01-1.4
一、口算。
7.9+0.1= 8.7+0.1= 0.78-0.1= 3.8+0.6=
3.4-0.2= 6.9-2.5= 0.61+0.23= 3.1+0.6=
4.2+0.3= 6.8-0.4= 0.69-0.48= 8.9-0.7=
6.3-0.5= 8.2-2.7= 0.78+0.27= 2.8-0.3=
1.1-0.4= 6.1+2.6= 0.81-0.13= 3.2-0.8=
7.5+0.7= 6-1.7= 0.63-0.12= 4.7+0.5=
8.6-0.9= 7.4-0.4= 0.85-0.24= 4.2+0.8=
4.8+0.4= 8.6-3.2= 0.79+0.08= 2.9-0.5=
二、混合运算。
0.67-0.01+9.8 8.8-0.71-3.29 82.7+12.2+48.6
77+33.01+43.9 86.08-40.87+24.19 8.99-1.63-7.27
70-(2.16+0.72) 63.6-(29.3+5.2) 8.83-1.42-7.04
一、口算。
2.6-0.4= 8.1+3= 0.72+0.4= 5-0.7=
8.3+0.2= 7.3-2.2= 0.76+0.49= 4.5+0.5=
5+0.1= 7.4+1= 0.86-0.08= 1.6+0.4=
8.2+0.5= 7.4-0.6= 0.85-0.02= 6.9+0.8=
1.6-0.4= 6.1+0.5= 0.78+0.15= 4.5+0.8=
4.2-0.5= 7.1-3.6= 0.83-0.11= 7.9+0.4=
8.8+0.5= 7+1.8= 0.65+0.49= 6.8-0.3=
1.8+0.8= 6-1.4= 0.6-0.26= 1.6+0.7=
二、混合运算。
0.6-0.14+0.3 8.4-0.64-1.36 92.2+29.9+32.4
74.88+20+40.67 87.78+42.79+11.03 5.64-1.53-3.49
60-(1.44-0.32) 95.1-(23.2-2) 7.37+5.54-1.14
一、口算。
3.1-0.1= 7.2-2.7= 0.63+0.09= 7.6+0.8=
4.2+0.6= 7.3-1.4= 0.69-0.02= 5.2-0.5=
8.3-0.6= 7.9+3.6= 0.62-0.32= 6.1-0.3=
1.1-0.6= 8.7-3.5= 0.7+0.11= 4.7+0.4=
2.4-0.3= 8.4-2.4= 0.82+0.46= 1-0.9=
8.1+0.9= 7.1-1.2= 0.77+0.34= 4.7+0.1=
6.9+0.1= 6-0.1= 0.66+0.06= 7.6+0.4=
7.3+0.9= 7.6+4.4= 0.89-0.46= 8-0.5=
二、混合运算。
0.7-0.48+4.8 8.4-0.82-2.18 46.4+24.5-18.3
84.63+46.81+32.35 68.25+26+22.04 7.06-2.02-3.75
40-(1.79-0.55) 96.7+(23.8-5.9) 6.59-3.64-1.8
一、口算。
3.7+0.4= 8.7-0.1= 0.72-0.01= 6.4+0.9=
6-0.3= 7.3-4.9= 0.83+0.12= 6.3+0.2=
3.6-0.6= 8-0.8= 0.78-0.25= 6.6-0.1=
2.3+0.4= 8.7-2.1= 0.73-0.28= 3.8+0.7=
7.4-0.9= 7+2= 0.65+0.13= 1.3+0.2=
2.2+0.1= 8.5-1.1= 0.75+0.42= 5.8-0.5=
7.7+0.4= 7.8-1.5= 0.88+0.24= 6.1+0.2=
5.3-0.3= 6.7+2.3= 0.72+0.06= 2.1+0.7=
二、混合运算。
0.66+0.41+5 7.8-0.85-3.15 70-50.2-11.1
63.74-29.81+51.86 85.51+43.7+92.93 8.21+2.84-3.2
50-(1.65+0.84) 86.2+(24.3+7.2) 5.61-3.5+2.1
一、口算。
3.1-0.5= 6.1-2.9= 0.89-0.45= 8.9-0.7=
4.3-0.5= 6.5-3.1= 0.82+0.37= 9-0.6=
7.9+0.8= 8.4+1.3= 0.82+0.01= 2.6-0.5=
4.2+0.4= 7.9+0.8= 0.78+0.45= 5.9+0.7=
7.1-0.9= 6.8+4.7= 0.67+0.22= 1.3-0.5=
4.1-0.6= 8.5+0.3= 0.89-0.15= 4.5-0.7=
2.8+0.4= 8.1+1.2= 0.9+0.32= 8.2-0.3=
4.2+0.6= 8.5-2.9= 0.84+0.33= 3+0.7=
二、混合运算。
0.9+0.35+4.9 8.7-0.65-4.35 76.9-13.8-31.1
83.29+35.16+67.8 85.36+18.33+16.97 6.16+1.51-4.12
60-(4.14-0.96) 67.2+(26.7+7.5) 7.36-5.3+1.48
一、口算。
6.4-0.8= 8-0.2= 0.7+0.49= 2.5+0.5=
6.7-0.4= 6.6-2.3= 0.77-0.43= 6.7+0.1=
3.6-0.9= 8-0.2= 0.88-0.02= 6.9+0.9=
4.9-0.1= 8.4-1.2= 0.64-0.13= 8.7+0.5=
3.7-0.2= 8.8-2.8= 0.71+0.09= 4.7-0.8=
7.2+0.7= 8.6+2.6= 0.61-0.31= 8.8+0.1=
8.4-0.7= 6.4-1= 0.76+0.16= 8-0.7=
2.2+0.2= 7+1.6= 0.87+0.38= 8-0.2=
二、混合运算。
0.76+0.03+2.9 9.7-0.13-1.87 63.2+15.3-24.3
83.67-17.67+38.48 86.41-13.99+21.16 3.55-1.65+1.17
80-(4.55+0.94) 67.7+(20.6-9) 5.05+2.07+2.78
一、口算。
3.7+0.8= 6.5+0.7= 0.78-0.31= 3.2-0.4=
2.2-0.5= 7-4.4= 0.84+0.44= 6.9-0.4=
2+0.4= 7.3-2.3= 0.82-0.48= 5.4-0.1=
8-0.6= 8.2-1.1= 0.75-0.19= 6.6-0.4=
6.9+0.4= 6.5+1.2= 0.64-0.48= 1.7-0.6=
7.8+0.1= 7.6-2.6= 0.69-0.37= 3.8+0.7=
1.5-0.8= 7.7+3.2= 0.88-0.15= 3.6-0.6=
2.7+0.8= 8.8+2.1= 0.67+0.06= 5.8-0.8=
二、混合运算。
0.72-0.25+8.6 7.3-0.87-3.13 89.1+72.7+10.8
64.56-34.29+28.78 82.6+13.2+10.83 3.75+1.65+2.08
40-(5.69+0.4) 89.3+(28.4+8.2) 5.03-1.72+2.74
一、口算。
2.3-0.9= 7.9+4.3= 0.68-0.04= 5.8+0.8=
3.3-0.1= 7.6+2.1= 0.87-0.19= 3.5-0.2=
3.2-0.2= 8.7-4.1= 0.65+0.16= 5.2+0.8=
1.2+0.5= 8.9-2.3= 0.9-0.14= 2.5-0.5=
4.3+0.3= 6.7-3.2= 0.66-0.34= 2.2+0.2=
4.6+0.9= 9+0.1= 0.67-0.27= 1.3+0.1=
4.1-0.9= 6.4+0.9= 0.61+0.26= 4.3+0.1=
2.2-0.7= 7+3= 0.87+0.14= 4-0.5=
二、混合运算。
0.81-0.47+8.5 7.5-0.14-3.86 83.4-44.2+17.7
70.39+22.87+69.31 81.67+39.69+18.74 5.49+3.93+1.29
90-(4.11-0.75) 60.6-(22.2+5.9) 9.85+5.29+4.37
一、口算。
8.8+0.5= 8.3+4.5= 0.9+0.29= 2.7-0.6=
5.2+0.2= 8.2-4.5= 0.66+0.03= 4.9+0.3=
2+0.8= 8.6+0.5= 0.86-0.12= 7.1+0.7=
2.3-0.6= 6.6+4.4= 0.9-0.34= 6.4+0.5=
1.9-0.9= 7.5-3.2= 0.76-0.05= 3.3-0.9=
3.4+0.8= 6.5-0.6= 0.75+0.15= 1.2-0.2=
6.5-0.3= 7.5+2.9= 0.71+0.01= 6-0.2=
3.9+0.8= 8.7-0.5= 0.82-0.07= 5.1+0.8=
二、混合运算。
0.82-0.06+8.3 8.4-0.88-2.12 62.4+33.8+28.6
82.89-24.42+59.39 87.91+29.77+32.1 7.14+1.37-4.21
40-(8.31-0.8) 95.7-(14.4-8.3) 5-3.22-1.55
一、口算。
7.6+0.4= 7.4-3.4= 0.72+0.43= 6.4+0.4=
6.5-0.4= 7.7+4.5= 0.7-0.4= 2.1+0.3=
2.4+0.5= 7.2+1.6= 0.82-0.33= 3.7+0.1=
5.7+0.2= 8.4+2.9= 0.71-0.11= 6.5-0.9=
6-0.7= 9+2.6= 0.7+0.01= 5.2+0.7=
4.1+0.9= 7.9-0.9= 0.84+0.15= 8.7-0.7=
3.8-0.9= 7.4-1.6= 0.82-0.03= 1.9-0.2=
4.2+0.7= 6.6-4.1= 0.71+0.14= 1.4+0.5=
二、混合运算。
0.86-0.46+7.4 5.5-0.44-4.56 36.8+15.2+15.2
84.59+12.68+48.91 87.77+40.54+91.15 9.87+1.75-6.8
90-(7.64+0.95) 75.7-(28+1.1) 6.85+3.14-2.4
一、口算。
6.2-0.1= 9+0.4= 0.66+0.21= 3.1+0.1=
1.2-0.9= 7.4-1.7= 0.67-0.21= 2.8-0.6=
4.8+0.2= 7.8+1.4= 0.64-0.26= 1.5+0.1=
7.2-0.8= 6.5+1.6= 0.63+0.28= 8.8-0.9=
5.6-0.4= 7.6-3.9= 0.69-0.33= 7.3-0.4=
5.4-0.6= 6.5+4.7= 0.88-0.03= 2.4-0.6=
2.9-0.4= 8.8-4.1= 0.85-0.2= 8.9-0.1=
3+0.2= 8.9-2= 0.87-0.35= 2.1-0.1=
二、混合运算。
0.7+0.46+4.6 9.9-0.49-4.51 84.5+66.2-13.6
63.43+47.93+82.37 66.16+47.1+87.23 6.19+3.32-2.07
90-(1.94-0.38) 72.6+(18+8.2) 9.81+8.29-1.14
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