脱式主要掌握的是记住要先算乘、除法,后算加、减法四加减法计算题100道。在乘除法连继计算时中,要按从左往右的顺序依次计算。遇到括号,要首先计算括号内部。在脱式过程中要按运算顺序划出运算顺序线,还要做到“三核对”,一要核对从书上把题抄到作业本上数字、符号是否抄对。二要核对从横式抄到草稿竖式的数字、符号是否抄对。三要核对把草稿竖式上的得数,抄到横式上是否抄对,小数点是否点对地方,有无遗漏。
(1)5.03-2.5+0.96
(2)22.8-5.23-9.125
(3)23.66+4.34-3.56
(4)67.2+41.5-71.39
(5)10.75+0.4-9.473
21.77+52.32=
98.44+43.36=
17.16-15.51=
68.41-30.91=
86.93-54.74=
35.18+37.07=
92.03-64.75=
86.1-60.02=
49.33-10.68=
30.9-27.38=
14.37+44.27=
65.87+52.17=
57.89+95.96=
39.13+58.46=
11.73+50.8=
33.12+81.76=
69.73+97.78=
18.73-15.06=
42.5-21.44=
36.99+37.37=
97.37-32.15=
95.65+98.31=
74.42-36.17=
71.38-41.71=
67.43+35.1=
39.21-17.87=
66.69-14.86=
72.12-35.01=
55.01-47.56=
60.27+44.42=
96.96+36.22=
85.2+37.83=
20.04+27.82=
76.48-50.05=
48.59+21.82=
90.96+59.52=
42.09+72.74=
78.21-22.41=
30.49+88.29=
38.14+23.71=
62.25-18.09=
26.87+60.05=
69.48+52.77=
50.15-47.8=
80.26+44.04=
74.01-38.43=
62.58+44.74=
58.71-37.87=
57.56+75.16=
68.01+73.27=
57.06+12.78=
56.24-29.13=
17.33+58.55=
65.04+58.99=
15.85+51.41=
75.33-59.28=
33.54-27.87=
20.37+20.97=
68.09-35.21=
69.24+35.4=
44.89-13.02=
38.55+20.65=
5.6×2.9
3.77×1.8
0.02×96
5.22×0.3
9.99×0.02
4.67×0.9
5×2.44
1.666×6.1
9.432×0.002
5.6×6.5
4.88×2.9
5.61×4.3
8.9×2.4
5.5×55
9.77×0.02
1.384×5.1
8.78×83
2.6×61
0.059×0.2
4.268×1.7
57×5.7
9.46×2.85
17.8×6.4
1.5×4.9
2.5×0.88
5.555×5.2
2.22×3.33
7.658×85
36.02×0.3
56.78×8
除法:
85.44÷16
42.84÷7
101.7÷9
67.5÷15
230.4÷6
21.24÷36
0.736÷23
43.5÷12
35.21÷7
39.6÷24
6.21÷0.03
210÷1.4
51.3÷0.27
91.2÷3.8
0.756÷0.18
0.66÷0.3
11.97÷1.5
69.6÷2.9
38.4÷0.8
15÷0.06
(循环小数的用简便方法,除不尽保留2位小数):
8.2÷0.12
0.8÷0.9
76.4÷5.4
4.7÷3
1.25÷1.2
32÷42
14.36÷2.7
8.33÷6.2
1.7÷0.03