人教版四年级数学下册小数口算题专练.doc

口算题：（每天10题）
（1）8.42＋9.48＝ 42.56＋3.124＝ 91.26－30.35＝
15.6十0.237＝ 80－52.l＝ 7.35—1.41＝
2.6＋l.4＝ 1.9＋0.8l＝ 0.58＋0.42＝ 1.63—1.23＝
（2）10-0.41= 45-0.45= 3.57+3=
6.14+3.83= 7.93-1.64= 5.23-2.36=
2.6＋l.4＝ 1.9＋0.8l＝ 0.58＋0.42＝ 1.63—1.23＝
（3）3.44+3.36= 7.74-5.85= 9.35-4.74= 38.63-3.48= 1.16+4.77= 8.17-5.26=
2.6＋l.4＝ 1.9＋0.8l＝ 0.58＋0.42＝ 1.63—1.23＝
（4）2.26-0.86= 4.93+4.75= 76.55+4.68= 31.1+4.5= 31.9+3.4= 3.45+4.6=
0.9－0.25＝ 9.9—0.01＝ 4—2.3＝ 3.2一1.7＝
（5）4.45+54.5= 3.83+5.55= 2.75+1.3= 39.4-2.75= 67.3-1.26= 61.9+6.2=
2.6＋l.4＝ 1.9＋0.8l＝ 0.58＋0.42＝ 1.63—1.23＝
（6）67.1-6.6= 46.8-2.8= 47.6-2.15=
10-0.41= 45-0.45= 3.57+3=
2.6＋l.4＝ 1.9＋0.8l＝ 0.58＋0.42＝ 1.63—1.23＝
（7）27.38+4.83= 26.75+2.83= 3.64-2.58= 6.52-3.44= 15.31+13.51=
5.5+4.5= 3.27-2.49= 11.65-7.39= 19.01-7.99= 7.51+0.49=
（8）5.48-3.25= 4.8+18.9= 10.3+58.7= 8.03-4.56= 9.03-8.57=
8.25+1.55= 9.43-9.05= 1.75+2.08= 4.28-3.37= 4.13+2.24=
（9）4.17+2.53= 5.07-0.98= 5.67-0.73= 13.18+5.27= 5.16+7.89=
26.8+3.02= 6.07-4.993= 3.7+2.36= 15.4+2.97= 10.2-8.75=
（10）7.3-2.25= 3.8+3.54= 3.05-2.9= 3.1-2.07= 12.7+6.58=
7.81-3.735= 12.16+5.347= 0.4-0.125= 18.7+3.96= 9.6+4.78=
（11）5.67-0.845= 0.506-0.19= 11.04-7.3= 1.4-0.405= 62.1-17.07=
1.4-0.405= 3.906+0.66= 43.5-27.34= 15.98-3.9= 75.6-3.55=
（12）5.94+10.7= 12.03+0.875= 37.8+3.02= 0.704-0.25= 10.1-0.55=
10+10.1= 27+8.03= 26+7.98= 13.99+1= 7.88+2 =
（13）28-3.56= 10-0.81= 10-0.36= 20-0.92= 8-7.089=
95-9.85= 20-9.42= 35.09-11= 96.85-85= 45.45-45=
（14）27.38+4.83= 26.75+2.83= 3.64-2.58= 6.52-3.44= 15.31+13.51=
5.5+4.5= 3.27-2.49= 11.65-7.39= 19.01-7.99= 7.51+0.49=
（15）5.48-3.25= 4.8+18.9= 10.3+58.7= 8.03-4.56= 9.03-8.57=
8.25+1.55= 9.43-9.05= 1.75+2.08= 4.28-3.37= 4.13+2.24=
（16）4.17+2.53= 5.07-0.98= 5.67-0.73= 13.18+5.27= 5.16+7.89=
26.8+3.02= 6.07-4.993= 3.7+2.36= 15.4+2.97= 10.2-8.75=
（17）7.3-2.25= 3.8+3.54= 3.05-2.9= 3.1-2.07= 12.7+6.58=
7.81-3.735= 12.16+5.347= 0.4-0.125= 18.7+3.96= 9.6+4.78=
（18）5.67-0.845= 0.506-0.19= 11.04-7.3= 1.4-0.405= 62.1-17.07=
1.4-0.405= 3.906+0.66= 43.5-27.34= 15.98-3.9= 75.6-3.55=
（19）5.94+10.7= 12.03+0.875= 37.8+3.02= 0.704-0.25= 10.1-0.55=
10+10.1= 27+8.03= 26+7.98= 13.99+1= 7.88+2 =
（20）28-3.56= 10-0.81= 10-0.36= 20-0.92= 8-7.089=
95-9.85= 20-9.42= 35.09-11= 96.85-85= 45.45-45=
7.05－0.05＝ 0.78—0.38＝ 3.5十5.5＝ 5.5—3.9＝